A few days with a GX80

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I should probably start with a disclaimer: I'm basing this off of a purchase of a used GX80 last Monday, and unfortunately I returned it today because it had a scratch on the sensor. So, it was really just a few days that I got to try it out.

History

I've been sort-of interested in micro four thirds since a long time. When I had a Pentax DSLR, I was already thinking that maybe a smaller system would be nice to have. But I never purchased an actual camera in the range. As a secondary camera I have pretty much had compact cameras. Right now my DSLR is a Nikon D750 and the compact camera is an RX100 V. I have an underwater housing for that RX100 V too, as well as a JJC grip that mounts to the tripod socket on the underside of the camera.

About a year ago, I traveled to Costa Rica with my D750 and a zoom triplet (18-35, 24-120 and Tamron 100-400), plus my phone (mistake; I should have brought my RX, but ok). What I found was that while 400mm was sometimes enough for wildlife, more often than not it just wasn't. But I wasn't willing to take a substantially bigger lens with me. I considered a used Nikon 200-500/5.6, but that about doubles the weight, and it wouldn't fit in my regular camera bag either.

Of course, the other side of the range-equation is the crop, either in post or by the sensor. And so I considered other options: a Nikon 1 J5 with adapter, a Nikon DX body like the D7500, or a higher-MP Nikon FX body like the D850. The first option lacks a viewfinder, the second would mean carrying two relatively bulky bodies, and the third was still bigger and heavier than my D750.

Another thing came into play: the underwater housing for my RX100 V is rather substantial, and that's not always the best thing when scuba diving. But there is an underwater housing for the Lumix GM1, which is smaller. The GM1 itself is smaller as well. And so, I was beginning to wonder, if I could replace my camera system for travel with an all-MFT system.

I also started watching the MicroFourNerds YT channel, so I got a bit more familiar with the camera models and lenses.

Buying decision

One thing lead to another and I thought to myself, why not get a cheaper used camera to see what it's like? At first I tried to chase down a GM1, but they are not so cheap (the brown one they sold exclusively in Japan looks SO stylish though ;)). I briefly considered a GX800, but I know from past experiences with a Pentax Q10, that I would want to have a viewfinder. Also I realised that, for non-scuba photography, I would be much better served with a slightly bigger, more capable body. So I ended up looking at the GX80. I found a good deal with the 12-32 kit lens and an Olympus 12-50 lens, and purchased it. As I mentioned, that was last Monday.

One thing to note is that I did look at Olympus too, but I went with Lumix for two reasons: the lens zoom rings rotate in the same direction as on my Nikon lenses (maybe a bit of a silly reason but ok), and the more traditional look of e.g. an EM-5 makes the camera a bit larger. Not ideal for an RX100 V replacement, which is how I envisioned this camera: small, discrete, and great for street photography.

Experiences

As I said, I only had a few days with the camera, but my experiences over those days are on the whole, quite positive. Control-wise, there is a lot, though to switch focus modes you do need to go into the quick menu. I struggled a bit with the exposure modes, only to find out that I could press the rear dial inwards to make it change function: from aperture control to exposure compensation for example. In general I have to say that I feel much more "invited" to control the camera than I do with the RX100 V. The Sony is a technical marvel, but the ergonomics are just not my thing at all. But this GX80 was a very pleasant surprise. Speaking about ergonomics: the slight grip was enough to securely hold the camera, at least with the small 12-32mm lens. It felt almost as secure as my RX100 does with the JJC grip. The camera is a little larger and heavier than the Sony, but I like that, and it actually doesn't feel any heavier (precisely because it is larger).

There were some annoyances: I had to be careful when looking through the viewfinder, as my cheek would sometimes touch the touch screen and move the focus point. I find it a bit strange that the screen turns off when it detects you're looking through the EVF, yet the touch functionality still works, including on the left side of the screen. Another annoyance is that, in order to tilt the little flash in order for it to bounce off of a ceiling, part of my hand would sometimes be in front of that same EVF sensor, and so the screen would be disabled. But it's possible to get used to this.

Another annoyance has to do with image review. On both my D750 and RX100, if I play back images, I can zoom in to 100% with a single touch of a button/lever. I like doing this to check critical sharpness. With the GX80, first of all there is no 100% mode to directly jump to (or even iteratively go to). And secondly, if you shoot RAW, the image you're looking at is the low-resolution JPEG that is embedded within the RAW file. So it's not really usable for this. I had to switch the camera to RAW+JPEG (fine) in order to be able to at least see the detail in image review. Thankfully, image review sees the two files as one photo.

After reading a lot of negative remarks about the viewfinder, it actually surprised me positively. It is a field-sequential panel, but that did not bother me. And it is 16:9, so when displaying a 4:3 image the panel isn't fully used for the image. But I still found it a more pleasant experience than the tiny EVF of the RX100 V.

Performance

I did very little testing of this, but I will report on what I did do. I compared the image quality to my other two cameras by setting up sort of a still life scene and shooting all three from a tripod, with self-timer, at equivalent exposure settings, as follows:
  • RX100: f/4, 1/6s, ISO 100 (focal length 18.5mm)
  • GX80: f/5.6, 1/6, ISO 200 (focal length 25mm)
  • D750: f/11. 1/6s, ISO 800 (focal length 50mm)
The GX80 performed as I expected for a 16MP camera: it resolved the least amount of detail compared to the other two, but the difference between it and the RX100 wasn't big at all. It is interesting to note that the bokeh of the RX100 was noticeably worse than that of the GX80, both in terms of outlining and regarding LoCAs. Which makes sense; you wouldn't expect a compact camera lens to be engineered with good bokeh in mind. Mind you, there wasn't a lot of bokeh of course, but this was still something I noticed.

I also did some quick testing of the stabilisation using the 12-32mm lens. The camera indicated "dual IS", meaning it used both the sensor shift stabilisation and the optical stabilisation in the lens. I just took a few shots, but it did seem to work quite effectively. Of course, as ever, YMMV.

Closing thoughts

To be honest, despite the positive experiences, I find myself rethinking the broader issue. This is a system camera, with a slow kit lens. The RX100 V with its sensor and lens combination is still a stop faster in equivalent terms. You can of course mount different lenses, but then the package becomes much bigger than the Sony. At the same time, would I really replace a camera with a sensor 4 times the size, with this one? Also to invest in the lenses for that system? Because despite the smaller footprint, the lenses aren't actually that cheap. Like, the Lumix 12-35mm f/2.8 is more expensive than the Nikon AF-S 24-120mm f/4 on MPB. And you get a 24-70mm f/5.6 equivalent zoom range. I could buy a Nikon 24-85/3.5-4.5 for much cheaper, and already save a bit of weight compared to my 24-120, and it would still be faster in equivalent terms. But then, that is a consumer lens, and the Lumix 12-35 is a pro lens.

I have been looking at the Lumix LX100 II as well. That is even a bit smaller than the GX80, and it has a fast lens. But it doesn't have a tilting screen. It is almost a bit of a conundrum: if you want the best street photography compact camera, that might be a system camera. But then, should you invest in that system?

Maybe getting the GX80 wasn't the best place to start; maybe I should have gotten the tiny GM1. On the other hand, as an introduction to the system, it's probably overall still a better choice for most people.

But I did enjoy the tiny lenses, and still getting great image quality. In that sense, it reminds me of that Pentax Q I mentioned in a positive way: it's just a joyful, unencumbered experience. With a viewfinder, excellent controls, and good stabilization.
 
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After reading a lot of negative remarks about the viewfinder, it actually surprised me positively. It is a field-sequential panel, but that did not bother me. And it is 16:9, so when displaying a 4:3 image the panel isn't fully used for the image. But I still found it a more pleasant experience than the tiny EVF of the RX100 V.
I think this is understated, whilst many dislike the EVF on the GX80, many also have no issues, I'm in the no issues camp too.

Check out the original G9's control layout, Lumix look like they where targeting Nikon users specifically!

(edit) also the 14mm f/2.5 is tiny, only 55g, with AF, great on a GX for street imo!
 
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Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints, but if you're selling or exhibiting you might need something more. And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
 
Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6. Of course, this is similar to fullframe where the Sony A7R V, for example, faces this issue at f/7.1. The issue is that there are plenty of lenses below f/7.1, but fewer lenses below f/5.6. And so on and so forth.
 
Addendum

While reviewing the images from the GX80 against the RX100 V and D750, something else caught my attention, and I think I didn't fully appreciate how significant it was. The aspect ratio of both other cameras is 3:2, but that of the GX80 is, of course, 4:3. I think, after having looked through 3:2 viewfinders for so long, I've grown accustomed to the wider view, and I naturally look for wider compositions. I think it might not be bad to have another camera that encourages me to see things differently. But at the same time, it might take some time for me to make the most out of it.
 
I should probably start with a disclaimer: I'm basing this off of a purchase of a used GX80 last Monday, and unfortunately I returned it today because it had a scratch on the sensor. So, it was really just a few days that I got to try it out.

History

I've been sort-of interested in micro four thirds since a long time. When I had a Pentax DSLR, I was already thinking that maybe a smaller system would be nice to have. But I never purchased an actual camera in the range. As a secondary camera I have pretty much had compact cameras. Right now my DSLR is a Nikon D750 and the compact camera is an RX100 V. I have an underwater housing for that RX100 V too, as well as a JJC grip that mounts to the tripod socket on the underside of the camera.

About a year ago, I traveled to Costa Rica with my D750 and a zoom triplet (18-35, 24-120 and Tamron 100-400), plus my phone (mistake; I should have brought my RX, but ok). What I found was that while 400mm was sometimes enough for wildlife, more often than not it just wasn't. But I wasn't willing to take a substantially bigger lens with me. I considered a used Nikon 200-500/5.6, but that about doubles the weight, and it wouldn't fit in my regular camera bag either.

Of course, the other side of the range-equation is the crop, either in post or by the sensor. And so I considered other options: a Nikon 1 J5 with adapter, a Nikon DX body like the D7500, or a higher-MP Nikon FX body like the D850. The first option lacks a viewfinder, the second would mean carrying two relatively bulky bodies, and the third was still bigger and heavier than my D750.

Another thing came into play: the underwater housing for my RX100 V is rather substantial, and that's not always the best thing when scuba diving. But there is an underwater housing for the Lumix GM1, which is smaller. The GM1 itself is smaller as well. And so, I was beginning to wonder, if I could replace my camera system for travel with an all-MFT system.

I also started watching the MicroFourNerds YT channel, so I got a bit more familiar with the camera models and lenses.

Buying decision

One thing lead to another and I thought to myself, why not get a cheaper used camera to see what it's like? At first I tried to chase down a GM1, but they are not so cheap (the brown one they sold exclusively in Japan looks SO stylish though ;)). I briefly considered a GX800, but I know from past experiences with a Pentax Q10, that I would want to have a viewfinder. Also I realised that, for non-scuba photography, I would be much better served with a slightly bigger, more capable body. So I ended up looking at the GX80. I found a good deal with the 12-32 kit lens and an Olympus 12-50 lens,
Mind you this could be among the weakiest lenses among M43. On GX85, you would use IBIS only which should be around max <2 stops... Most stablized Panny lenses are having around 3~3.5 stops effective stabilization!

Non stablized lenses are not best on GX85.
and purchased it. As I mentioned, that was last Monday.

One thing to note is that I did look at Olympus too, but I went with Lumix for two reasons: the lens zoom rings rotate in the same direction as on my Nikon lenses (maybe a bit of a silly reason but ok), and the more traditional look of e.g. an EM-5 makes the camera a bit larger. Not ideal for an RX100 V replacement, which is how I envisioned this camera: small, discrete, and great for street photography.

Experiences

As I said, I only had a few days with the camera, but my experiences over those days are on the whole, quite positive. Control-wise, there is a lot, though to switch focus modes you do need to go into the quick menu. I struggled a bit with the exposure modes, only to find out that I could press the rear dial inwards to make it change function: from aperture control to exposure compensation for example. In general I have to say that I feel much more "invited" to control the camera than I do with the RX100 V. The Sony is a technical marvel, but the ergonomics are just not my thing at all. But this GX80 was a very pleasant surprise. Speaking about ergonomics: the slight grip was enough to securely hold the camera, at least with the small 12-32mm lens. It felt almost as secure as my RX100 does with the JJC grip. The camera is a little larger and heavier than the Sony, but I like that, and it actually doesn't feel any heavier (precisely because it is larger).

There were some annoyances: I had to be careful when looking through the viewfinder, as my cheek would sometimes touch the touch screen and move the focus point.
This is a double edge knife feature IMHO. It is called Touch PAD AF (when using the evf) and Touch AF (when using the LCD) by panny.

For those who are happier with 100% focus point control by using single focus point under the focus-recompose style of shooting, able to set focus point on exactly where you need it to is faster and more accurate than asking AF system to guess what you are wishing (as per the AF technology at that era). These 2 AF modes are a blessing.

However for many reasons these could also be a nightmare because the focus point might be moved by mistake with or without our notice. There is an OFFSET option to reduce the chance of accidental focus point movement but not always works for me.

The DISP key

is a short cut to recenter the focus focus. But not 100% convenince still.

Fortunately these 2 AF modes & the Touch LCD operation can be disabled independently in Menu. So depending on our preferences we can disable either the Touch PAD AF or Touch AF on GX85 (sadly Touch AF on GX9 cannot be disabled :-( ). As the Direct Focus Area can be used as a one time Touch AF, I mapped DFA to a fn key for the feature if I need it (e.g. on tripod).
I find it a bit strange that the screen turns off when it detects you're looking through the EVF, yet the touch functionality still works, including on the left side of the screen.
As said it is the Touch Pad AF, a feature which should be first introduced on GX7 and later other M43 models got it gradually.
Another annoyance is that, in order to tilt the little flash in order for it to bounce off of a ceiling, part of my hand would sometimes be in front of that same EVF sensor, and so the screen would be disabled. But it's possible to get used to this.
Far better than those models that their integrated flash can't be bounced :-) .
Another annoyance has to do with image review. On both my D750 and RX100, if I play back images, I can zoom in to 100% with a single touch of a button/lever. I like doing this to check critical sharpness. With the GX80, first of all there is no 100% mode to directly jump to (or even iteratively go to). And secondly, if you shoot RAW, the image you're looking at is the low-resolution JPEG that is embedded within the RAW file. So it's not really usable for this. I had to switch the camera to RAW+JPEG (fine) in order to be able to at least see the detail in image review. Thankfully, image review sees the two files as one photo.

After reading a lot of negative remarks about the viewfinder, it actually surprised me positively. It is a field-sequential panel, but that did not bother me. And it is 16:9, so when displaying a 4:3 image the panel isn't fully used for the image. But I still found it a more pleasant experience than the tiny EVF of the RX100 V.
A trick for Panny to keep GX7/85/9 small. For a bigger andore comfortable evf in 4:3, Panny has the GX8 which is a steroid GX7 having size similar to the DSLR foam factor G85 :-( ...
Performance

I did very little testing of this, but I will report on what I did do. I compared the image quality to my other two cameras by setting up sort of a still life scene and shooting all three from a tripod, with self-timer, at equivalent exposure settings, as follows:
  • RX100: f/4, 1/6s, ISO 100 (focal length 18.5mm)
  • GX80: f/5.6, 1/6, ISO 200 (focal length 25mm)
  • D750: f/11. 1/6s, ISO 800 (focal length 50mm)
The GX80 performed as I expected for a 16MP camera: it resolved the least amount of detail compared to the other two, but the difference between it and the RX100 wasn't big at all. It is interesting to note that the bokeh of the RX100 was noticeably worse than that of the GX80, both in terms of outlining and regarding LoCAs. Which makes sense; you wouldn't expect a compact camera lens to be engineered with good bokeh in mind. Mind you, there wasn't a lot of bokeh of course, but this was still something I noticed.

I also did some quick testing of the stabilisation using the 12-32mm lens. The camera indicated "dual IS", meaning it used both the sensor shift stabilisation and the optical stabilisation in the lens. I just took a few shots, but it did seem to work quite effectively. Of course, as ever, YMMV.

Closing thoughts

To be honest, despite the positive experiences, I find myself rethinking the broader issue. This is a system camera, with a slow kit lens. The RX100 V with its sensor and lens combination is still a stop faster in equivalent terms. You can of course mount different lenses, but then the package becomes much bigger than the Sony. At the same time, would I really replace a camera with a sensor 4 times the size, with this one? Also to invest in the lenses for that system? Because despite the smaller footprint, the lenses aren't actually that cheap. Like, the Lumix 12-35mm f/2.8 is more expensive than the Nikon AF-S 24-120mm f/4 on MPB. And you get a 24-70mm f/5.6 equivalent zoom range. I could buy a Nikon 24-85/3.5-4.5 for much cheaper, and already save a bit of weight compared to my 24-120, and it would still be faster in equivalent terms. But then, that is a consumer lens, and the Lumix 12-35 is a pro lens.

I have been looking at the Lumix LX100 II as well. That is even a bit smaller than the GX80, and it has a fast lens. But it doesn't have a tilting screen. It is almost a bit of a conundrum: if you want the best street photography compact camera, that might be a system camera. But then, should you invest in that system?

Maybe getting the GX80 wasn't the best place to start; maybe I should have gotten the tiny GM1. On the other hand, as an introduction to the system, it's probably overall still a better choice for most people.
I had once fancy to get a GM5 (because of the evf) as my backup. After trying it in showroom, my dream was broken because it is too small for my usual operation. I picked up a GX850 later.

The GMs should be fine for P&S I think.
But I did enjoy the tiny lenses, and still getting great image quality. In that sense, it reminds me of that Pentax Q I mentioned in a positive way: it's just a joyful, unencumbered experience. With a viewfinder, excellent controls, and good stabilization.
I can't move away from M43 because of the relatively small bodies (not anymore on recent releases), the acceptable IQ, rich features, and small lenses. MY usual setup: 7-14 f/4, 12-32, 45-150 f/4-5.6 & 15 f/1.7 are <0.8kg only. It is similar for my wife who uses the 265g 14-140 mostly. Nothing really can compete with it yet.

Yes, a lot of eq discussions around. But when the sweet spot of the above lenses are on wide opening, it might give some foods for thought IMHO too.

Although we upgraded to GX9 and G85 for sometimes, GX85 is still my most love camera.

My 2 cents.

--
Albert
** Please forgive my typo error.
** Please feel free to download my image and edit it as you like :-) **
About my
G85: https://www.dpreview.com/forums/post/63025800
GX850/GF9: https://www.dpreview.com/forums/post/65326127
GX9: https://www.dpreview.com/forums/post/67648667
 
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Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6.
AFAIK the diffraction softness starting to affect the IQ should be happened on f/11 onward. Therefore f/8 is usually the smallest aperture that is recommended to use on general purposes. As per my home testing, f/22 would start to affect IQ for close up shooting.

Although generally some M43 lenses are having sweet spots on wide opening, most of the remaining lenses are best on ~1 stop stopping down. Hence f/5.6 is not only fine to M43 on diffraction concern, it might be the best for some.

Therefore, I have an easy life to shoot at wide opening of my lenses for the sharpness, plus already good amount of DoF for my needs :-) .

Of course, this is similar to fullframe where the Sony A7R V, for example, faces this issue at f/7.1. The issue is that there are plenty of lenses below f/7.1, but fewer lenses below f/5.6. And so on and so forth.
 
Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6.
AFAIK the diffraction softness starting to affect the IQ should be happened on f/11 onward. Therefore f/8 is usually the smallest aperture that is recommended to use on general purposes. As per my home testing, f/22 would start to affect IQ for close up shooting.
I used https://www.photopills.com/calculators/diffraction to determine this, though I heard about it before in reviews of for example the iPhone 15 Pro; its tele lens is already diffraction limited wide open. It seems to come down to this: a certain f-number will create a certain "airy disc" (which I think is the dispersement pattern of the light waves), and a smaller pixel size will be affected by a certain airy disc diameter earlier than a larger pixel size. And of course the pixel size depends on two factors: sensor size and number of megapixels. So in other words, if you want a certain number of megapixels and a certain aperture, there will be a minimum sensor size if you want to avoid diffraction.
Although generally some M43 lenses are having sweet spots on wide opening, most of the remaining lenses are best on ~1 stop stopping down. Hence f/5.6 is not only fine to M43 on diffraction concern, it might be the best for some.
Therefore, I have an easy life to shoot at wide opening of my lenses for the sharpness, plus already good amount of DoF for my needs :-) .
I kind of expected this. Most of the Nikon Z-mount lenses are also quite from wide open, whereas the older F-mount lenses usually improve much more on stopping down. But it's good to know.
 
In general I have to say that I feel much more "invited" to control the camera than I do with the RX100 V.
This is *exactly* what the DPR review said, too. And me too. Great on Auto, painful otherwise. I made a custom setting that was basically auto everything but with Auto ISO Minimum Shutter Speed of 1/125 and left it there. My experience indoors was that it would keep the ISO low by decreasing the shutter speed, which ended up giving me fits due to subject and/or camera motion.

I went to my E-M1 iii to get around this. To (nearly) match the lens range and Aperture, I got the 12-40mm f/2.8. The combo is absolutely huge compared to the RX100m5, but almost everything I want to adjust is one button away. And the stabilization is far better. Between the stabilization and the somewhat better ISO tolerance, I have far fewer problems with sharpness indoors. I am much happier shooting the Oly. (I always could have shot the Sony with a higher ISO (I'm resigned to that now, coz blurry pics are not so useful, though AI is helping a bit) but the sacrifice in image is visible to me.)

The Sony is a technical marvel, but the ergonomics are just not my thing at all.
Give it enough light and it takes gorgeous pictures and video, IMO. But it's painful as the light fades and hard to mess around with.
 
Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6.
AFAIK the diffraction softness starting to affect the IQ should be happened on f/11 onward. Therefore f/8 is usually the smallest aperture that is recommended to use on general purposes. As per my home testing, f/22 would start to affect IQ for close up shooting.
I used https://www.photopills.com/calculators/diffraction to determine this, though I heard about it before in reviews of for example the iPhone 15 Pro; its tele lens is already diffraction limited wide open. It seems to come down to this: a certain f-number will create a certain "airy disc" (which I think is the dispersement pattern of the light waves), and a smaller pixel size will be affected by a certain airy disc diameter earlier than a larger pixel size. And of course the pixel size depends on two factors: sensor size and number of megapixels. So in other words, if you want a certain number of megapixels and a certain aperture, there will be a minimum sensor size if you want to avoid diffraction.
I used that site in the recent past. Some specific numbers and implications...
  • I have a 20MP GH body. For this resolution, diffraction 'starts' at f/5.6 (not significant but just starts if you observe closely)
  • I also have the 25MP G9II. At this resolution, diffraction starts at f/5. This is important
  • I have a PL12-60, whose best sharpness across the frame is at f/5.6. I also use f/5.6 most of the time for landscapes and it gives me sufficient DOF. This means, it is a good lens on the GH body, but into diffraction territory on the G9II
  • If there was another model tomorrow that has 40MP resolution, diffraction starts at f/4. The only zoom I have that has best sharpness at f/4 is the 40-150/2.8 PRO. Otherwise primes. It means, we have to compromise on DOF or best sharpness with affordable lenses
  • This is a good scenario to consider why better glass is required as resolution increases
Although generally some M43 lenses are having sweet spots on wide opening, most of the remaining lenses are best on ~1 stop stopping down. Hence f/5.6 is not only fine to M43 on diffraction concern, it might be the best for some.

Therefore, I have an easy life to shoot at wide opening of my lenses for the sharpness, plus already good amount of DoF for my needs :-) .
I kind of expected this. Most of the Nikon Z-mount lenses are also quite from wide open, whereas the older F-mount lenses usually improve much more on stopping down. But it's good to know.
 
Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6.
AFAIK the diffraction softness starting to affect the IQ should be happened on f/11 onward. Therefore f/8 is usually the smallest aperture that is recommended to use on general purposes. As per my home testing, f/22 would start to affect IQ for close up shooting.
I used https://www.photopills.com/calculators/diffraction to determine this, though I heard about it before in reviews of for example the iPhone 15 Pro; its tele lens is already diffraction limited wide open. It seems to come down to this: a certain f-number will create a certain "airy disc" (which I think is the dispersement pattern of the light waves), and a smaller pixel size will be affected by a certain airy disc diameter earlier than a larger pixel size. And of course the pixel size depends on two factors: sensor size and number of megapixels. So in other words, if you want a certain number of megapixels and a certain aperture, there will be a minimum sensor size if you want to avoid diffraction.
I used that site in the recent past. Some specific numbers and implications...
  • I have a 20MP GH body. For this resolution, diffraction 'starts' at f/5.6 (not significant but just starts if you observe closely)
  • I also have the 25MP G9II. At this resolution, diffraction starts at f/5. This is important
  • I have a PL12-60, whose best sharpness across the frame is at f/5.6. I also use f/5.6 most of the time for landscapes and it gives me sufficient DOF. This means, it is a good lens on the GH body, but into diffraction territory on the G9II
  • If there was another model tomorrow that has 40MP resolution, diffraction starts at f/4. The only zoom I have that has best sharpness at f/4 is the 40-150/2.8 PRO. Otherwise primes. It means, we have to compromise on DOF or best sharpness with affordable lenses
  • This is a good scenario to consider why better glass is required as resolution increases
I think this is just running into the physical limitations of a smaller sensor system. Like, for every system, there is f/5.6 glass (mostly in zoom lenses but still). If you want more resolution, well then those f/5.6 lenses need to be replaced by faster ones. But faster means bigger and heavier too. And with that, you throw the size and weight advantage of MFT out the window.

Something similar probably goes for lenses that you need to stop down to f/5.6. If you want to make versions that perform optimally at larger apertures, they probably need to be bigger and heavier too.

So it seems that, outside of pixel shift, stitching, or focus stacking, the only way to defeat diffraction is with a shallower depth of field. And this is true regardless of sensor size. After all, f/11 on fullframe 24MP is also bordering on diffraction territory.
 
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Performance

I did very little testing of this, but I will report on what I did do. I compared the image quality to my other two cameras by setting up sort of a still life scene and shooting all three from a tripod, with self-timer, at equivalent exposure settings, as follows:
  • RX100: f/4, 1/6s, ISO 100 (focal length 18.5mm)
  • GX80: f/5.6, 1/6, ISO 200 (focal length 25mm)
  • D750: f/11. 1/6s, ISO 800 (focal length 50mm)
The GX80 performed as I expected for a 16MP camera: it resolved the least amount of detail compared to the other two, but the difference between it and the RX100 wasn't big at all. It is interesting to note that the bokeh of the RX100 was noticeably worse than that of the GX80, both in terms of outlining and regarding LoCAs. Which makes sense; you wouldn't expect a compact camera lens to be engineered with good bokeh in mind. Mind you, there wasn't a lot of bokeh of course, but this was still something I noticed.
Not impossibly, in your brief time with this camera, you didn't get to read page 149 of the Advanced Guide - where there's a warning of possible issues when mounting it on a tripod with IBIS engaged...



befb44a19fbe4e2a96ac76f39de99098.jpg


[ There's a similar warning, on P154, in the manual for the GX9 ]

Peter
 
Perhaps a thought about where these images are going to be seen would help. Those old 16mp images were fine for social media and small prints
Sorry, but… I see this kind of comment a lot, and it’s absolutely ridiculous. 2MP images are fine for social media. 16MP is absolute overkill for that.
I see you did not answer my question, which was the whole point of my comment. If you are using these photos just for small prints and social media there are some other cameras that might well serve your purpose better, especially if you are happy with 2MP.
, but if you're selling or exhibiting you might need something more.
For printing, it really depends on whether someone is going to inspect details of an image, much more than the print size itself. I think this video explains it very well:
And to be fair, if you'd bought better glass for that GX80 you'd probably also have much better quality images than the little Sony.
Resolution-wise the RX actually surprised me. But then I only compared center crops of lenses in the middle of their zoom ranges at closed down apertures, because I was interested in sensor/camera behavior. I do suspect the RX lens probably isn’t as good as many MFT lenses. Though it’s not bad either.

To be honest, the lower resolution of the GX80 compared to the RX100 V does have me looking at the GX9. Because if MFT takes the place of my RX, I don’t think I’d want to go back to a lower resolution. Even if the difference is small.

But 20-25MP for MFT is probably the useful limit as well. At 20MP you’re already running into diffraction even at f/5.6. Of course, this is similar to fullframe where the Sony A7R V, for example, faces this issue at f/7.1. The issue is that there are plenty of lenses below f/7.1, but fewer lenses below f/5.6. And so on and so forth.
If you are the sort of photographer who can tell the difference between f/4.0 and f/5.6 in a photo from a GX80 at normal viewing distances, then I suspect the GX80 is not the camera for you 😁

If this is the case then a 20MP G100 with a stabilised lens or two might be a better bet than the GX80. There are many who suggest that the image quality that comes out of the G100 is as good as the G9 in many cases. But no matter what, if you tell us how you use your images then that will help all who want to answer your question.
 

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