Free to explore other mounts (camera systems: Panasonic & Fuji vs Canon)

ikolbyi

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Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
 
Since you are not using this as your main camera, I would go with the cheapest option.
 
Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
I don’t quite understand what you mean about going to Canon being full replacement in lenses? You can use the EF lenses with the EF-RF adapter. You said you even tried this already?

EF-RF is the only one I’d really trust that it’s gonna work well. Anything else is a mixed bag. If you don’t agree with that then EF lenses are pretty versatile you can do petty much any of the mirrorless brands like Sony or Nikon.

The Fuji’s are nice but better make sure they have the lenses you want. If you want fast lenses you gotta be ok with primes and they are hugely expensive. That’s my problem with them. I don’t quite understand what the point of Medium format is if you are just gonna use an f/4 lens.

The R5 seems like the path of least resistance.
 
Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
I don’t quite understand what you mean about going to Canon being full replacement in lenses? You can use the EF lenses with the EF-RF adapter. You said you even tried this already?

EF-RF is the only one I’d really trust that it’s gonna work well. Anything else is a mixed bag. If you don’t agree with that then EF lenses are pretty versatile you can do petty much any of the mirrorless brands like Sony or Nikon.

The Fuji’s are nice but better make sure they have the lenses you want. If you want fast lenses you gotta be ok with primes and they are hugely expensive. That’s my problem with them. I don’t quite understand what the point of Medium format is if you are just gonna use an f/4 lens.

The R5 seems like the path of least resistance.
I don't like adapters and generally avoid them. Therefore I would need to eventually replace my EF lenses, except in case of Panasonic, I only need to replace 1 lens. Sigma offers a mount change service for my other 2 lenses.

The only time I really use adapters are when I use vintage film lenses to obtain an 'effect'. Adapting EF-RF or EF-G would be temporary stop gaps untill the lenses could be replaced die to cost.

I have no experience with Canon R5, but the R has a horrible EVF, and I do prefer dual card slots.

Regarding F/4 lenses, if I am shooting with a wide angle len (less than 40mm) then I typically open up the aperture to F8+. If 100mm+ then I am F1.x through F12.

I prefer to stay away from Sony.
 
Since you are not using this as your main camera, I would go with the cheapest option.
The cheapest would be Panasonic because I can convert the EF mount on my 2 most expensive lenses to L-mount and would only need to replace 1 lens completely. That is the sole Canon L glass lens I own.
 
Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
I don’t quite understand what you mean about going to Canon being full replacement in lenses? You can use the EF lenses with the EF-RF adapter. You said you even tried this already?

EF-RF is the only one I’d really trust that it’s gonna work well. Anything else is a mixed bag. If you don’t agree with that then EF lenses are pretty versatile you can do petty much any of the mirrorless brands like Sony or Nikon.

The Fuji’s are nice but better make sure they have the lenses you want. If you want fast lenses you gotta be ok with primes and they are hugely expensive. That’s my problem with them. I don’t quite understand what the point of Medium format is if you are just gonna use an f/4 lens.

The R5 seems like the path of least resistance.
I don't like adapters and generally avoid them. Therefore I would need to eventually replace my EF lenses, except in case of Panasonic, I only need to replace 1 lens. Sigma offers a mount change service for my other 2 lenses.
Gotcha. Interesting I didn’t know they did that. I think they’d have to put some kind of extender on there so it’s really just a intregal adapter if that makes sense. It’s not turning a DSLR lens into a mirrorless lens presumably. The Sigma DN lenses are the true native mirrorless lenses. What Signa lenses do you have?
The only time I really use adapters are when I use vintage film lenses to obtain an 'effect'. Adapting EF-RF or EF-G would be temporary stop gaps untill the lenses could be replaced die to cost.

I have no experience with Canon R5, but the R has a horrible EVF, and I do prefer dual card slots.
The R5 has a cfexpress typeB and an SD slot. So kinda had dual slots
Regarding F/4 lenses, if I am shooting with a wide angle len (less than 40mm) then I typically open up the aperture to F8+. If 100mm+ then I am F1.x through F12.
Interesting. Medium format probably isn’t for you then. You can’t get FF DOF equivalent of f/9 on a medium format due to defraction. You can get about FF equivalent of f/7 on Medium format and then defraction kicks in

On the flip side Medium format equivalent to F/2 in FF is almost but not quite f/4 in medium format with equivalent lenses. So you could get away with the f/4 in the telephoto range. Unfortunately the only zoom is a f/5.6. There’s a 110 f/2 a 120 f/4 and a 250 f/4 but those are $2700-$3300 each. 120mm in medium format is almost 100mm in FF.

I think you can mark the Fuji off the list. It’s really the opposite of what you want. Most people want shallower DOF in the wide angles cause it’s harder to get with those.
 
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Not a Canon mirrorless owner, but I don't understand you making a decision against Canon on the basis of being dissatisfied with the handling/performance of the Canon R. That was Canon's first marketed try at full-frame mirrorless. While the S1R was also a first full-frame generation for its manufacturer, Panasonic, unlike Canon, had plenty of experience at high-capability cameras (G9, GH5). DPR TV in their recent comparison of high-resolution full-frame cameras seemed to think highly of the R5, including its EVF and rear LCD.

I was under the impression that the electronic communication between camera and lens was largely the same for Canon EF-mount DSLRs and their mirrorless full-frame products, which would imply potential high compatibility. (There have to be a few communication differences, for example for the new multipurpose control ring on the lens adapter). However, some of your lenses being Sigma, you can't be sure if there are any compatibility differences because of Sigma's emulation of Canon communication protocols, unless you test it out.

That's what I'd do. Rent an R5 plus at least the Canon lens adapter(s), and give it all a good workout with all of your lenses. Also gives you a chance to evaluate the EVF. I question the wisdom of your dislike of adapters before giving them a try on at least an R5.
 
Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
I don’t quite understand what you mean about going to Canon being full replacement in lenses? You can use the EF lenses with the EF-RF adapter. You said you even tried this already?

EF-RF is the only one I’d really trust that it’s gonna work well. Anything else is a mixed bag. If you don’t agree with that then EF lenses are pretty versatile you can do petty much any of the mirrorless brands like Sony or Nikon.

The Fuji’s are nice but better make sure they have the lenses you want. If you want fast lenses you gotta be ok with primes and they are hugely expensive. That’s my problem with them. I don’t quite understand what the point of Medium format is if you are just gonna use an f/4 lens.

The R5 seems like the path of least resistance.
I don't like adapters and generally avoid them. Therefore I would need to eventually replace my EF lenses, except in case of Panasonic, I only need to replace 1 lens. Sigma offers a mount change service for my other 2 lenses.
Gotcha. Interesting I didn’t know they did that. I think they’d have to put some kind of extender on there so it’s really just a intregal adapter if that makes sense. It’s not turning a DSLR lens into a mirrorless lens presumably. The Sigma DN lenses are the true native mirrorless lenses. What Signa lenses do you have?
The only time I really use adapters are when I use vintage film lenses to obtain an 'effect'. Adapting EF-RF or EF-G would be temporary stop gaps untill the lenses could be replaced die to cost.

I have no experience with Canon R5, but the R has a horrible EVF, and I do prefer dual card slots.
The R5 has a cfexpress typeB and an SD slot. So kinda had dual slots
Regarding F/4 lenses, if I am shooting with a wide angle len (less than 40mm) then I typically open up the aperture to F8+. If 100mm+ then I am F1.x through F12.
Interesting. Medium format probably isn’t for you then. You can’t get FF DOF equivalent of f/9 on a medium format due to defraction. You can get about FF equivalent of f/7 on Medium format and then defraction kicks in

On the flip side Medium format equivalent to F/2 in FF is almost but not quite f/4 in medium format with equivalent lenses. So you could get away with the f/4 in the telephoto range. Unfortunately the only zoom is a f/5.6. There’s a 110 f/2 a 120 f/4 and a 250 f/4 but those are $2700-$3300 each. 120mm in medium format is almost 100mm in FF.

I think you can mark the Fuji off the list. It’s really the opposite of what you want. Most people want shallower DOF in the wide angles cause it’s harder to get with those.
The two Sigma lens I own are the backbone of my shooting: 105mm F/1.4 Art & 120-300mm F/2.8 Sports.

The Canon 24-70mm F/4 L is hardly used unless I am shooting landscapes or landscape portraits at F8 or F10. I would eventually replace this lens with a 30mm prime.
 
Not a Canon mirrorless owner, but I don't understand you making a decision against Canon on the basis of being dissatisfied with the handling/performance of the Canon R. That was Canon's first marketed try at full-frame mirrorless. While the S1R was also a first full-frame generation for its manufacturer, Panasonic, unlike Canon, had plenty of experience at high-capability cameras (G9, GH5). DPR TV in their recent comparison of high-resolution full-frame cameras seemed to think highly of the R5, including its EVF and rear LCD.

I was under the impression that the electronic communication between camera and lens was largely the same for Canon EF-mount DSLRs and their mirrorless full-frame products, which would imply potential high compatibility. (There have to be a few communication differences, for example for the new multipurpose control ring on the lens adapter). However, some of your lenses being Sigma, you can't be sure if there are any compatibility differences because of Sigma's emulation of Canon communication protocols, unless you test it out.

That's what I'd do. Rent an R5 plus at least the Canon lens adapter(s), and give it all a good workout with all of your lenses. Also gives you a chance to evaluate the EVF. I question the wisdom of your dislike of adapters before giving them a try on at least an R5.
Regarding adapters, I own the metabones EF-m4/3 and it is a giant paperweight. It can not lock focus on neither my Sigma or Canon lens. I updated the firmware on it as well. I can only use it in manual focus mode and that is only practical for landscapes.

The Canon R I borrowed (firmware 1.0) I used the EF-RF adapter with it. The Sigma lenses appeared to work fine, but I had an absolute horrible experience with the EVF that made the camera unusable for me. The EVF lag was so horrendous that I couldn't properly use the camera and missed most of my shots. I do not have this experience at all with my Olympus.

My main criteria here is a camera with a FF sensor (or larger) at minimum 30mb in size because I find myself with this system cropping 50-60%, and need the data to throw out in order to have enough image detail. Camera will typically operate between 5000-10000 ISO where the Olympus struggles (for obvious reasons). I also require C-AF to function, and typically that is not the case with adapters... Except for Canon EF-RF, it appeared to work on R but I did have a high out-of-focus miss rate compared to my 5D.m4. Sigma/Panasonic forums and corp already verified for me I must have native L-mount lenses for C-AF to work and Sigma will convert each lens for a couple of hundred each. That is significantly cheaper than buying all new glass. I'm more than impressed with Sigma lens performance.

This system will be a niche camera only operating where the Olympus can't be successful. Why Olympus primary? Size & Weight. (It's weatherproofing is a bonus). And the images are just as good provided you have ISO below 4000.
 
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Since Canon decided to EOL the EF mount, this opened the door for me to part ways with Canon when my 5D.m4 eventually breaks. The question is, which system would best to consider? Panasonic S1r, Fuji GFX 50s, or stay with Canon R5?

My existing Sigma lenses can be converted to L-mount, this means I can make these lenses native to Panasonic.

The Canon & Fuji I would need to adapt (not ideal).

I have tried a Canon R (firmware 1.0) with my lenses and it worked fine with the EF-RF adapter, but I absolutely hated the Canon R camera body. Very poor mirrorless implementation in comparison to my Olympus, largely with EVF execution. I have no complaints with my 5D and Olympus systems.

The Fuji appeal is the sensor size. Panasonic appeal because I can natively convert my lenses (cheapest investment). Canon would be just as costly as Fuji (being full replacement) but in a smaller sensor.

Any feedback on these systems from owners?

Primary purpose of this system is low-light photography, my m4/3 Olympus handles everything else.
The problem I have with Fuji GFX cameras is the banding in the shadows.

Any reason why you are not considering the Nikon D850? I was in the same boat as you with a Canon 5DS, and after getting the D850 I wish I had made the move much sooner. It is an amazing camera
 
Not a Canon mirrorless owner, but I don't understand you making a decision against Canon on the basis of being dissatisfied with the handling/performance of the Canon R. That was Canon's first marketed try at full-frame mirrorless. While the S1R was also a first full-frame generation for its manufacturer, Panasonic, unlike Canon, had plenty of experience at high-capability cameras (G9, GH5). DPR TV in their recent comparison of high-resolution full-frame cameras seemed to think highly of the R5, including its EVF and rear LCD.

I was under the impression that the electronic communication between camera and lens was largely the same for Canon EF-mount DSLRs and their mirrorless full-frame products, which would imply potential high compatibility. (There have to be a few communication differences, for example for the new multipurpose control ring on the lens adapter). However, some of your lenses being Sigma, you can't be sure if there are any compatibility differences because of Sigma's emulation of Canon communication protocols, unless you test it out.

That's what I'd do. Rent an R5 plus at least the Canon lens adapter(s), and give it all a good workout with all of your lenses. Also gives you a chance to evaluate the EVF. I question the wisdom of your dislike of adapters before giving them a try on at least an R5.
Regarding adapters, I own the metabones EF-m4/3 and it is a giant paperweight. It can not lock focus on neither my Sigma or Canon lens. I updated the firmware on it as well. I can only use it in manual focus mode and that is only practical for landscapes.

The Canon R I borrowed (firmware 1.0) I used the EF-RF adapter with it. The Sigma lenses appeared to work fine, but I had an absolute horrible experience with the EVF that made the camera unusable for me. The EVF lag was so horrendous that I couldn't properly use the camera and missed most of my shots. I do not have this experience at all with my Olympus.

My main criteria here is a camera with a FF sensor (or larger) at minimum 30mb in size because I find myself with this system cropping 50-60%, and need the data to throw out in order to have enough image detail. Camera will typically operate between 5000-10000 ISO where the Olympus struggles (for obvious reasons). I also require C-AF to function, and typically that is not the case with adapters... Except for Canon EF-RF, it appeared to work on R but I did have a high out-of-focus miss rate compared to my 5D.m4. Sigma/Panasonic forums and corp already verified for me I must have native L-mount lenses for C-AF to work and Sigma will convert each lens for a couple of hundred each. That is significantly cheaper than buying all new glass. I'm more than impressed with Sigma lens performance.

This system will be a niche camera only operating where the Olympus can't be successful. Why Olympus primary? Size & Weight. (It's weatherproofing is a bonus). And the images are just as good provided you have ISO below 4000.
You know none of the cameras you list are going to be particularly good at iso 6400 and 12800. Typically you want a lower MP count for high ISO values. What do you need that high of ISO for anyway?



Fuji GFX 50S vs Olympus E OM-D E-M1 Mark II at ISO 12800
Fuji GFX 50S vs Olympus E OM-D E-M1 Mark II at ISO 12800



LUMIX S1R vs E-M1 MII at ISO 12800
LUMIX S1R vs E-M1 MII at ISO 12800

45 MP R5 vs to E-M1 M2 at ISO 12800
45 MP R5 vs to E-M1 M2 at ISO 12800

20 MP R6 vs E-M1 M2 at ISO 12800
20 MP R6 vs E-M1 M2 at ISO 12800

If this is a high ISO specific camera maybe think about a high ISO specific camera like the Sony A7S3. I know you dont want Sony and the MP count is low but if you just bring the right lens and frame correctly in camera you still have plenty of resolution for most uses.

Sony A7S3 vs E-M1 M2 at ISO 12800
Sony A7S3 vs E-M1 M2 at ISO 12800
 
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Any reason why you are not considering the Nikon D850? I was in the same boat as you with a Canon 5DS, and after getting the D850 I wish I had made the move much sooner. It is an amazing camera
I'm staying far away from Nikon for 2 reasons:

1) their financial troubles. I have already been bitten by this situation with Olympus and have limited faith in JIP creating innovation with the brand based on their track record with other product acquisitions. When my Olympus camera body eventually fails me many years down the road (it's only 1 year old), I will assess the situation then for my daily driver system.

2) I'm not impressed with Nikon mirrorless offerings, then again I am not impressed with Canon's 2nd attempt with the R neither. These companies have zero excuse why a home run could not be hit out-of-the gate. Both companies had/have mirrorless offerings prior to Z & R offerings to leverage.

VW auto maker is a good example, they were late to the SUV market with their 1st attempt the Toureg. But when they released the Atlas (late to the game and being out of the market for some time) it was a home run product. The company took their time and built something that was above the competition. Maybe the Canon R5 is this product? But for me it has video features that I will seldomly use and the R left a bad taste in my mouth. I also don't care for their over priced RF lenses. I have found Sigma Art/Sport lenses cheaper and equal if not better quality to some of Canon's L glass, but that depends on the lens. All that said, Canon would be the <safe choice> given their strong financials. I also have a heavy investment in Canon printers.

And no Sony, had them- no more. I don't like the direction they have taken their products.

I feel Fuji has the best strategy: APSC for portability/travel, Medium Format for the professional. Can they pull it off?

Panasonic seems to have stumble with the S1 family of cameras at release which I have some minor concern with. It also doesn't appear to be gaining a lot of market cap neither in this race, because it doesn't offering much more over Nikon and Canon FF. This is why I believe Fuji going Medium was a differentiator and the price came down to a level it has me asking questions. What Panasonic does have is L-mount, I can convert my primary 2 Sigma lenses from EF to native L-mount at a fraction of the replacement cost of a new lens.
 
Not a Canon mirrorless owner, but I don't understand you making a decision against Canon on the basis of being dissatisfied with the handling/performance of the Canon R. That was Canon's first marketed try at full-frame mirrorless. While the S1R was also a first full-frame generation for its manufacturer, Panasonic, unlike Canon, had plenty of experience at high-capability cameras (G9, GH5). DPR TV in their recent comparison of high-resolution full-frame cameras seemed to think highly of the R5, including its EVF and rear LCD.

I was under the impression that the electronic communication between camera and lens was largely the same for Canon EF-mount DSLRs and their mirrorless full-frame products, which would imply potential high compatibility. (There have to be a few communication differences, for example for the new multipurpose control ring on the lens adapter). However, some of your lenses being Sigma, you can't be sure if there are any compatibility differences because of Sigma's emulation of Canon communication protocols, unless you test it out.

That's what I'd do. Rent an R5 plus at least the Canon lens adapter(s), and give it all a good workout with all of your lenses. Also gives you a chance to evaluate the EVF. I question the wisdom of your dislike of adapters before giving them a try on at least an R5.
Regarding adapters, I own the metabones EF-m4/3 and it is a giant paperweight. It can not lock focus on neither my Sigma or Canon lens. I updated the firmware on it as well. I can only use it in manual focus mode and that is only practical for landscapes.

The Canon R I borrowed (firmware 1.0) I used the EF-RF adapter with it. The Sigma lenses appeared to work fine, but I had an absolute horrible experience with the EVF that made the camera unusable for me. The EVF lag was so horrendous that I couldn't properly use the camera and missed most of my shots. I do not have this experience at all with my Olympus.

My main criteria here is a camera with a FF sensor (or larger) at minimum 30mb in size because I find myself with this system cropping 50-60%, and need the data to throw out in order to have enough image detail. Camera will typically operate between 5000-10000 ISO where the Olympus struggles (for obvious reasons). I also require C-AF to function, and typically that is not the case with adapters... Except for Canon EF-RF, it appeared to work on R but I did have a high out-of-focus miss rate compared to my 5D.m4. Sigma/Panasonic forums and corp already verified for me I must have native L-mount lenses for C-AF to work and Sigma will convert each lens for a couple of hundred each. That is significantly cheaper than buying all new glass. I'm more than impressed with Sigma lens performance.

This system will be a niche camera only operating where the Olympus can't be successful. Why Olympus primary? Size & Weight. (It's weatherproofing is a bonus). And the images are just as good provided you have ISO below 4000.
You know none of the cameras you list are going to be particularly good at iso 6400 and 12800. Typically you want a lower MP count for high ISO values. What do you need that high of ISO for anyway?

Fuji GFX 50S vs Olympus E OM-D E-M1 Mark II at ISO 12800
Fuji GFX 50S vs Olympus E OM-D E-M1 Mark II at ISO 12800

LUMIX S1R vs E-M1 MII at ISO 12800
LUMIX S1R vs E-M1 MII at ISO 12800

45 MP R5 vs to E-M1 M2 at ISO 12800
45 MP R5 vs to E-M1 M2 at ISO 12800

20 MP R6 vs E-M1 M2 at ISO 12800
20 MP R6 vs E-M1 M2 at ISO 12800

If this is a high ISO specific camera maybe think about a high ISO specific camera like the Sony A7S3. I know you dont want Sony and the MP count is low but if you just bring the right lens and frame correctly in camera you still have plenty of resolution for most uses.

Sony A7S3 vs E-M1 M2 at ISO 12800
Sony A7S3 vs E-M1 M2 at ISO 12800


The high megapixel (MP) count is to address situations where I need to crop. Need that data for when I throw data out and retain some image detail.

The high ISO is because I need a high shutter speed (1/1000 - 1/1600) in lower light situations (ie: indoor sporting events, night time events)

I CAN get these shots with the m4/3 only if I drop the shutter speed, but then I contend with motion blur. Life is so much simpler when I use the 5D for this type of shooting, it is much more forgiving especially in the post-process.
 
Any reason why you are not considering the Nikon D850? I was in the same boat as you with a Canon 5DS, and after getting the D850 I wish I had made the move much sooner. It is an amazing camera
What Panasonic does have is L-mount, I can convert my primary 2 Sigma lenses from EF to native L-mount at a fraction of the replacement cost of a new lens.
Are you sure they can convert the 120-300 to L mount? It doesn’t look like the make that lens in an L mount and it says they can only convert lenses if they make the lens in the mount you want to go to.
 
Any reason why you are not considering the Nikon D850? I was in the same boat as you with a Canon 5DS, and after getting the D850 I wish I had made the move much sooner. It is an amazing camera
What Panasonic does have is L-mount, I can convert my primary 2 Sigma lenses from EF to native L-mount at a fraction of the replacement cost of a new lens.
Are you sure they can convert the 120-300 to L mount? It doesn’t look like the make that lens in an L mount and it says they can only convert lenses if they make the lens in the mount you want to go to.
Since you are asking the question, I will need to re-verify. I know when I had the 105mm F1.4 sent for calibration (I had a difficult time calibrating it to the 5D, they performed it for free) Sigma told me they offer the service of remounting the lens natively to L-Mount and now Sony as a service option. This was an incentive to keep customers with the brand and where I first learned of it. The 120-300mm I own is the latest generation of that line and part of the Sports line, I'm hoping so. Otherwise, then Panasonic is not so appealing because replacing a 300mm F/2.8 zoom is incredibility expensive. 60% of my 5D photos are shot with that lens. 30% with the 105mm and 5% with the 24-70mm ... typically between 24-40mm range. The remaining 5% is my fisheye and FD lens. I never bothered to replace the Canon EF 24-70mm F/4L with the Sigma version or a 35mm prime lens because the cost was not justifiable for the infrequent use. Besides the Canon version worked out as the 'better lens' the few times I need to record video having IS.

This investigation is to see where I should focus my attention when the 5D decides on its own to retire. I will be left with 4 EF lenses, 2 of which I really-really enjoy, and 1 not so much but it gets the job done. The 4th one: fisheye is redundant with my Olympus and no longer needed.

The new system I probably would only purchase (if I have to buy all new lenses) 2 lens: 30/35mm prime and 300mm F/2.8 zoom and nothing else as the Olympus fills everything else.

Though I will admit, the Sigma 105mm F/1.4 on the 5D takes breathtaking images where the Olympus with the 45mm F/1.4 (equivalent focal length being MFT) are almost equal .... but to my eye, not 100% on par. Sigma/5D wins in a side-by-side even in print. This is largely due to DOF differences between the systems and really comes down to the effect I'm trying to achieve.
 
Any reason why you are not considering the Nikon D850? I was in the same boat as you with a Canon 5DS, and after getting the D850 I wish I had made the move much sooner. It is an amazing camera
What Panasonic does have is L-mount, I can convert my primary 2 Sigma lenses from EF to native L-mount at a fraction of the replacement cost of a new lens.
Are you sure they can convert the 120-300 to L mount? It doesn’t look like the make that lens in an L mount and it says they can only convert lenses if they make the lens in the mount you want to go to.
Since you are asking the question, I will need to re-verify. I know when I had the 105mm F1.4 sent for calibration (I had a difficult time calibrating it to the 5D, they performed it for free) Sigma told me they offer the service of remounting the lens natively to L-Mount and now Sony as a service option. This was an incentive to keep customers with the brand and where I first learned of it. The 120-300mm I own is the latest generation of that line and part of the Sports line, I'm hoping so. Otherwise, then Panasonic is not so appealing because replacing a 300mm F/2.8 zoom is incredibility expensive. 60% of my 5D photos are shot with that lens. 30% with the 105mm and 5% with the 24-70mm ... typically between 24-40mm range. The remaining 5% is my fisheye and FD lens. I never bothered to replace the Canon EF 24-70mm F/4L with the Sigma version or a 35mm prime lens because the cost was not justifiable for the infrequent use. Besides the Canon version worked out as the 'better lens' the few times I need to record video having IS.

This investigation is to see where I should focus my attention when the 5D decides on its own to retire. I will be left with 4 EF lenses, 2 of which I really-really enjoy, and 1 not so much but it gets the job done. The 4th one: fisheye is redundant with my Olympus and no longer needed.

The new system I probably would only purchase (if I have to buy all new lenses) 2 lens: 30/35mm prime and 300mm F/2.8 zoom and nothing else as the Olympus fills everything else.

Though I will admit, the Sigma 105mm F/1.4 on the 5D takes breathtaking images where the Olympus with the 45mm F/1.4 (equivalent focal length being MFT) are almost equal .... but to my eye, not 100% on par. Sigma/5D wins in a side-by-side even in print. This is largely due to DOF differences between the systems and really comes down to the effect I'm trying to achieve.
Well I hate to bring bad news but at first inspection it doesn’t look like they can convert the 120-300. As I said before even if they could it’s really not “native” it just would have a built in adapter because those lenses are DSLR lenses not mirrorless lenses so however you want to look at that.

Going down the line Fuji doesn’t make a lens for the GFX 50R that gets even close to 300mm. They make a 250mm but that’s 200mm FF equivalent and it’s $3,300.

With the Panasonic you could use your one Sigma lens but is otherwise unexciting. Plus side is you can get 3rd party L Mounts lenses including Sigma but the 100-400mm f/5-6.3 DG DN OS C was the only one I could find that has 300mm. It is a true Mirrorless lens though.

As far as I can tell there’s no mirrorless lens that is 300mm 2.8 so you’d have to use an adapter if you want to stick with 2.8 anyway. EF-RF is as good as that’s gonna get so again we come back to Canon and the R5 which by all accounts is an incredible camera.
 
Well I hate to bring bad news but at first inspection it doesn’t look like they can convert the 120-300. As I said before even if they could it’s really not “native” it just would have a built in adapter because those lenses are DSLR lenses not mirrorless lenses so however you want to look at that.

Going down the line Fuji doesn’t make a lens for the GFX 50R that gets even close to 300mm. They make a 250mm but that’s 200mm FF equivalent and it’s $3,300.

With the Panasonic you could use your one Sigma lens but is otherwise unexciting. Plus side is you can get 3rd party L Mounts lenses including Sigma but the 100-400mm f/5-6.3 DG DN OS C was the only one I could find that has 300mm. It is a true Mirrorless lens though.

As far as I can tell there’s no mirrorless lens that is 300mm 2.8 so you’d have to use an adapter if you want to stick with 2.8 anyway. EF-RF is as good as that’s gonna get so again we come back to Canon and the R5 which by all accounts is an incredible camera.
Thank you for the overall feedback.

*sigh* hopefully my 5D.m4 doesn't break tomorrow and it lasts many more years because this discussion has made things obvious... It's looking like Canon still, maybe Fuji, but in either case I'm opening up my wallet. :( The Panasonic doesn't seem worth it if I am unable to convert my existing Sigma 120-300mm S. I need C-AF support and that means no adapters (except for Canon)
 
Well I hate to bring bad news but at first inspection it doesn’t look like they can convert the 120-300. As I said before even if they could it’s really not “native” it just would have a built in adapter because those lenses are DSLR lenses not mirrorless lenses so however you want to look at that.

Going down the line Fuji doesn’t make a lens for the GFX 50R that gets even close to 300mm. They make a 250mm but that’s 200mm FF equivalent and it’s $3,300.

With the Panasonic you could use your one Sigma lens but is otherwise unexciting. Plus side is you can get 3rd party L Mounts lenses including Sigma but the 100-400mm f/5-6.3 DG DN OS C was the only one I could find that has 300mm. It is a true Mirrorless lens though.

As far as I can tell there’s no mirrorless lens that is 300mm 2.8 so you’d have to use an adapter if you want to stick with 2.8 anyway. EF-RF is as good as that’s gonna get so again we come back to Canon and the R5 which by all accounts is an incredible camera.
Thank you for the overall feedback.

*sigh* hopefully my 5D.m4 doesn't break tomorrow and it lasts many more years because this discussion has made things obvious... It's looking like Canon still, maybe Fuji, but in either case I'm opening up my wallet. :( The Panasonic doesn't seem worth it if I am unable to convert my existing Sigma 120-300mm S. I need C-AF support and that means no adapters (except for Canon)
If you are that apprehensive about moving to mirrorless, and are satisfied with your 5DM4, maybe when there is a great sale, or whenever it gets discontinued, buy a new one, verify over the course of a few thousand shots that it doesn't have any manufacturing defects, and then put it on the shelf in reserve for when your current one bites the dust. (I wouldn't do that, but it might be the right thing for you).
 
If you are that apprehensive about moving to mirrorless, and are satisfied with your 5DM4, maybe when there is a great sale, or whenever it gets discontinued, buy a new one
You lost me because my Olympus is mirrorless.
 
If you are that apprehensive about moving to mirrorless, and are satisfied with your 5DM4, maybe when there is a great sale, or whenever it gets discontinued, buy a new one
You lost me because my Olympus is mirrorless.
Right. I guess I was just subconsciously thinking about your objection to the Canon R EVF, and projecting possible difficulties showing up with other full frame ones, for the uses to which you put your 5DM4 (which is different than your Olympus, which I think you said you use "for everything else", or words to that effect).

Still, the principle holds (even if it's not for the reason I wrongly stated). If you want certainty about the continued use of your EF lenses with all the functionality and behavior they now have on your 5DM4, why not just put away in reserve another EF-mount DSLR body (5DM4, or better) before they become unavailable? Problem solved.
 

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