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G7X macro focus an embarrassment - please tell me why

Started Jan 11, 2017 | Discussions
geepondy Senior Member • Posts: 2,303
G7X macro focus an embarrassment - please tell me why

I believe this was discussed some time ago but I can't find the thread.  My G7X close wide angle macro focus results is totally unusable.  A small center part is in focus but quickly drops off to extremely blurry corners, making the picture totally unusable.  It reminds me of those miniaturization filters shots I see.  Please explain why.  Whatever the reason I know my G15 does a much better job.  Not only can I focus much closer but while the corners may be a little blurry, the picture as a whole, is much more usable.  The same undesirable effect occurs with the G5X which of course shares the same lens and filter.  Recently our much beloved G12 work camera broke and was replaced with a G5X.  We take pictures of electronic sub assemblies and at times really need to focus close and expose finite detail such as solder connections, etc. and the G12 was so much better at this.

What is the workaround?  If you pull the camera back and zoom in, you can only zoom so close before it will no longer focus.  We can't get nearly as close and blow up the desired area of detail as we can with the G12 and G15.  We're really bummed especially as these little gems of cameras are hard to come by now.

Here is an example by what I mean.  This is with the G7X and unfortunately I don't have my G15 handy to do a comparison shot but trust me, it will do a much better job under the same circumstances.  This actually is not the worst example as I backed the camera off a bit from its closest focusing point.

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larry Contributing Member • Posts: 889
Re: G7X macro focus an embarrassment - please tell me why
2

It's the nature of the lens/sensor. My G7Xii does it, too. If you want sharp corners, get a 1/2.3" camera, or one with a full-size lens, not something shrunk down to fit in a pants pocket.

You know what?  I also just checked my HX80.  It's the same way...   Hmmm.

(unknown member) Veteran Member • Posts: 6,192
Re: G7X macro focus an embarrassment - please tell me why
1

geepondy wrote:

I believe this was discussed some time ago but I can't find the thread. My G7X close wide angle macro focus results is totally unusable. A small center part is in focus but quickly drops off to extremely blurry corners, making the picture totally unusable. It reminds me of those miniaturization filters shots I see. Please explain why. Whatever the reason I know my G15 does a much better job. Not only can I focus much closer but while the corners may be a little blurry, the picture as a whole, is much more usable. The same undesirable effect occurs with the G5X which of course shares the same lens and filter. Recently our much beloved G12 work camera broke and was replaced with a G5X. We take pictures of electronic sub assemblies and at times really need to focus close and expose finite detail such as solder connections, etc. and the G12 was so much better at this.

What is the workaround? If you pull the camera back and zoom in, you can only zoom so close before it will no longer focus. We can't get nearly as close and blow up the desired area of detail as we can with the G12 and G15. We're really bummed especially as these little gems of cameras are hard to come by now.

Here is an example by what I mean. This is with the G7X and unfortunately I don't have my G15 handy to do a comparison shot but trust me, it will do a much better job under the same circumstances. This actually is not the worst example as I backed the camera off a bit from its closest focusing point.

Sounds like you are doing specialised commercial macro work and you need a specialised camera for it. An ILC with a dedicated macro lens seems a better idea than one of these miniature large sensor cameras which will always be a bit of a lens compromise getting it all so small. The days of the 1/1.7" are gone and 1" is always going to be a diminished depth of field. The only macro lens I have is the Olympus 12-50 and this is much better than a compact as you can stand farther back from the subject.  A decent telephoto with macro would I think perform much better than your G's.

1" is very much of a hybrid between compact sensors and the larger ILC sensors and the latter give you no close focus at all with the standard lens.

What about a bridge camera which is one area where 1/2.3" survives as these usually can do macro and can have fast lenses at short focal lengths.

Howard S Senior Member • Posts: 2,212
Re: G7X macro focus an embarrassment - please tell me why
4

You took that shot at f1.8 try again at f8 or f11

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snowrunner Junior Member • Posts: 39
Re: G7X macro focus an embarrassment - please tell me why

Perhaps I'm doing something wrong but I've also found it's a pain to focus in macro mode. Most of the time the camera focuses on some point or structure in the background and it takes many attempts to achieve an acceptable result. I don't know, it might help to reduce the AF frame size but I've also noticed this behaviour with larger objects where the size shouldn't be an issue.

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Canon G7 X II
(unknown member) Veteran Member • Posts: 6,192
Re: G7X macro focus an embarrassment - please tell me why

snowrunner wrote:

Perhaps I'm doing something wrong but I've also found it's a pain to focus in macro mode. Most of the time the camera focuses on some point or structure in the background and it takes many attempts to achieve an acceptable result. I don't know, it might help to reduce the AF frame size but I've also noticed this behaviour with larger objects where the size shouldn't be an issue.

The best technique with most kit in my limited experience is to manually focus round about where you want to be and then move the camera slightly near and far to the subject to achieve fine focus.

snowrunner Junior Member • Posts: 39
Re: G7X macro focus an embarrassment - please tell me why

Greynerd wrote:

The best technique is to manually focus and then move the camera to achieve fine focus.

Yeah, that's probably the way to do it. I'm not a big fan of the manual focus, though, but I'll give it some more try.

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Canon G7 X II
(unknown member) Veteran Member • Posts: 6,192
Re: G7X macro focus an embarrassment - please tell me why
2

snowrunner wrote:

Greynerd wrote:

The best technique is to manually focus and then move the camera to achieve fine focus.

Yeah, that's probably the way to do it. I'm not a big fan of the manual focus, though, but I'll give it some more try.

Manual focus by wire is usually tricky but with macro hopefully you will find it is worth the effort as you do not fine tune with a dial but move the camera. The focal point is so critical with the massively shallow depth of field in macro mode that AF is the trickiest option in practice.

Good luck.

0lf
0lf Senior Member • Posts: 1,284
Re: G7X macro focus an embarrassment - please tell me why
4
  1. zoom in. Closest focus distance (5cm) extend beyond 35mm eq focal length
  2. close the lens. The larger the sensor, the thiner is depth of field. F/5.6 still give very thin DOF.
  3. Set the AF to macro or use MF to the closest possible and adjust by moving the camera
  4. If you need more magnification and don't use post processing, you can take advantage of the 20Mpixel by using the digital teleconverter (it is like emulating a smaller sensor camera)
  5. if you do a lot of macro, save the settings into the custom mode, then you have a dedicated macro mode on the mode dial

It is cm! 2x digital teleconverter used. AF (but contrasty target). SOOC jpeg, 0 PP

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Rg Regular Member • Posts: 152
Re: G7X macro focus an embarrassment - please tell me why
1

embarrassment is a good word for the macro focus on this camera, and yes my G15 is far better for close focus sharp detailed shots. Macro with an ILC is a production, and smaller sensor cameras can and should do a great job. It seems that every time you "upgrade", you get something, but something else is compromised (and you wonder why camera sales are getting soft?). While we're at it, the HDR on the G7X is in a word "laughable". I'm not bashing the camera, I have one and like it for what it does, but I use it for what it is good at, and I'm afraid that's about it.

(unknown member) Veteran Member • Posts: 6,192
Re: G7X macro focus an embarrassment - please tell me why

Rg wrote:

embarrassment is a good word for the macro focus on this camera, and yes my G15 is far better for close focus sharp detailed shots. Macro with an ILC is a production, and smaller sensor cameras can and should do a great job. It seems that every time you "upgrade", you get something, but something else is compromised (and you wonder why camera sales are getting soft?). While we're at it, the HDR on the G7X is in a word "laughable". I'm not bashing the camera, I have one and like it for what it does, but I use it for what it is good at, and I'm afraid that's about it.

If you look at a larger sensor in a camera as an upgrade in all respects then you can only expect to be disappointed as nothing extra comes without some compensating factor.

snowrunner Junior Member • Posts: 39
Re: G7X macro focus an embarrassment - please tell me why

0lf, Greynerd

thanks for your knowledgeable replies!

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Canon G7 X II
larry Contributing Member • Posts: 889
Re: G7X macro focus an embarrassment - please tell me why

snowrunner wrote:

Perhaps I'm doing something wrong but I've also found it's a pain to focus in macro mode. Most of the time the camera focuses on some point or structure in the background and it takes many attempts to achieve an acceptable result. I don't know, it might help to reduce the AF frame size but I've also noticed this behaviour with larger objects where the size shouldn't be an issue.

My G7Xii also back-focuses for extreme closeups.  If you put the camera into manual focus, then you can rock back and forth.

yoyokal
yoyokal New Member • Posts: 24
Re: G7X macro focus an embarrassment - please tell me why

My S100 have macro settings. If I want to take macro picture I activated the macro and the camera could focus easly for near object. If I'm not activated it, the camera didn't or hard to focus the object. Please check this menu in your camera and if it is there you must try it.

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cab321 Regular Member • Posts: 151
Re: G7X macro focus an embarrassment - please tell me why

Many have posted about this, including myself

https://www.dpreview.com/forums/post/57498691

All compact large-sensor cameras do that, a technical limitation, unfortunately.

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pavluha Forum Member • Posts: 59
Re: G7X macro focus an embarrassment - please tell me why
1

This echoes my experience.  G7X II is simply not a good camera for macro.  It is possible to get decent results using manual focus, stopping down, and zooming in, but it takes far too much effort compared to most 1/2.3" sensor cameras.

The lens, however, is quite good when zoomed in and focused closer to infinity. So if you are pressed to shoot macros with G7X II, try ataching a quality close-up lens using some third-party adapter.

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OP geepondy Senior Member • Posts: 2,303
Re: G7X macro focus an embarrassment - please tell me why

I had an older powershot, forget the model as I've had many, but you could literally press the lens right up against the object you were focusing on.  Maybe it was my S3.

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Greg Gebhardt
Greg Gebhardt Forum Pro • Posts: 25,638
it is all about physics.

Even light has to obey this laws

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Greg
Jax, FL

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0lf
0lf Senior Member • Posts: 1,284
magnification, focal length and focus distances

Here is what the G7x can do about close focusing and magnification :

  • 5cm up to 16,58mm focal length. This is where the camera allows for maximum magnification.

  • 10cm up to 21,08mm FL.

  • 20cm up to 27,86mm FL. Note thats this focal length is already superior to the maximum of the RX100-3to5 and LX10/15

  • 30cm up to 31,63mm FL

  • 40cm up to 36,8mm FL

All pictures above are SOOC jpeg in L size (20Mpixel) and fine compression. All shots are manually focused.

Thanks to the large sensor, even at ISO 1600 (the camera series) the IQ remain good. So closing to ƒ/5.6 is not a problem.

You can also note that, because of the hight definition and the large sensor, you can magnify further and still keep enough definition. For example, below, 2x crop in post processing of the 16,58mm series :

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flektogon
flektogon Veteran Member • Posts: 6,226
Re: magnification, focal length and focus distances

Well, your Fuji X70 deserves better handling . It's a dusty poor guy. Btw. how do you compare its IQ to your Canon's?

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Regards,
Peter

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