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GFX100S worth it if ONLY planning to use adapted lenses?

  
 
js47
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p.5 #1 · GFX100S worth it if ONLY planning to use adapted lenses?


Makten wrote:
Even though I quite like the 100-200, it's not the best lens for landscape unfortunately. It seems optimized for relatively close range, where aberrations are considerably lower than at or near infinity. Even well stopped down, there can be a "haze"/halo around bright object, especially at the long end and focusing at large distance.

However, I'm not sure what to adapt instead. Personally I have the EF 70-300L which has very nice character and colors (but isn't very sharp), and the Sigma 100-400. Non of them cover much more than FF, so you'd want to use 24x36 crop, pano or
...Show more

Ah that is really disappointing to hear, I plan to use it for tele landscapes mostly at infinity focus. I guess we'll see how it goes. The alternative in my mind would be the EF100-400L since I have read that the sensor coverage is good.


Howie4life wrote:
I own the GFX 100S ii and use my 2 adapted EF lenses(35 1.4 ii & 50mm 1.4) as much as I use my native 80mm 1.7 lens. Native GFX lenses are expensive, relatively slow, and there are a lot of gaps in the lineup. My 2 EF lenses autofocus no different than my 80mm WITH the fringer adapter. I am a pixel peeper, and closed down to F/2.8, I get razor sharp images from the EF lenses. The sigma 50mm f1.4 has almost no visible vignette. I have owned the A1, R5, Z8, and A7rv cameras and the resolution
...Show more.

Thanks for that info Howie, are you talking about the Canon EF 50mm f1.4 or the Sigma version?

On the top of my list of potentially interesting fast prime lenses are the Nikon 35mm f2D, Canon EF 50mm f1.4 (if this is the lens you are talking about, otherwise The Spreadsheet suggests the coverage is only good for square crops), Nikon 50mm f1.8G, Nikon 58mm f1.4G, Canon 85mm f1.8, Nikon 85mm f1.8G, and finally the Canon EF 100mm f2. Plus the Sigma 14mm f1.8, Nikon 20mm f1.8 G, and Sigma 24mm f1.4 for astro but I know those last three don't quite cover the full sensor.

Also interested in the Canon EF 16-35 f4 (if I decide I want to go wider than the 20-35), Sigma 14-24 f2.8 (for astro and if I decide I want to go wider than the 16-35), Sigma 24-35 f2 (astro), and Canon EF 100-400 f4.5-5.6 for zooms.



Jun 04, 2026 at 01:03 AM
Geoff D F
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p.5 #2 · GFX100S worth it if ONLY planning to use adapted lenses?


gyoung143 wrote:
Are medium format film camera lenses not considered worth adapting? On the face of it such as Mamiya 645 lenses should have no trouble covering, and as reflex camera lenses should in theory give little trouble with fringing and curvature of field? Quite cheap in UK.

Gerry


I have a lot of Pentax 645 lenses that AF via a Fringer adapter. The AF is accurate but noisy and not quick - like 1990s screw drive AF. The Pentax lenses perform well but are not as good as GFX lenses. They benefit a bit from being stopped down. I don't mind them because I'm not always chasing the ultimate in resolution.



Jun 04, 2026 at 03:50 AM
gdanmitchell
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p.5 #3 · GFX100S worth it if ONLY planning to use adapted lenses?


ruthenium wrote:
I have taught university students for the last 30 years; thus, I know that an average human being regularly makes mistakes, and when this happens, this is normal.
Basically, it is best to treat others with the understanding that no one is perfect, rather than with the unrealistic expectation that my neighbor should never make mistakes.

Another human problem is the difficulty of expressing thoughts clearly and unambiguously. This problem might be behind the present discussion and disagreement.
Assuming that what Dan meant from the start was about the crop factors (when he referred to the "differences") and not about
...Show more

That is exactly what I meant. “Difference” can be expressed in more than one way (e.g. as a percentage) and not all scales are linear. Since I had already decided not to “beat that horse” in this thread any longer, I’ll leave it at that… except to thank you for the reply that I might have written concerning “meaningful differences.”

(As i wrote earlier, beyond confirming yiur hunch about that pointI in my earlier post, won’t continue that factual discussion in this thread.)

As a sometime user of adapted lenses on a different system — lenses that are also used by some on GFX — depending on the sort of use you put them to they can sometimes be fine options. (In my case I use a Mirex TS adapter with Pentax MF zoom lenses on a FF system for some landscape work where movements are useful and where I’m happy to manually focus and deal with manual aperture control.)

Regarding my distinctly non-first-person experience with GFX lenses (which is admittedly very limited but not zero), a friend of mine has spoken to me in very positive terms about his experience with the GFX 100-200mm lens for his landscape photography, FWIW. (If you are a landscape photographer and don’t know about him, you might look into him, his work, and his background a bit.)

Edited on Jun 04, 2026 at 01:56 PM · View previous versions



Jun 04, 2026 at 05:09 AM
Howie4life
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p.5 #4 · GFX100S worth it if ONLY planning to use adapted lenses?


js47 wrote:
Ah that is really disappointing to hear, I plan to use it for tele landscapes mostly at infinity focus. I guess we'll see how it goes. The alternative in my mind would be the EF100-400L since I have read that the sensor coverage is good.

.

Thanks for that info Howie, are you talking about the Canon EF 50mm f1.4 or the Sigma version?

On the top of my list of potentially interesting fast prime lenses are the Nikon 35mm f2D, Canon EF 50mm f1.4 (if this is the lens you are talking about, otherwise The Spreadsheet suggests the coverage is only good
...Show more

I have the sigma version of the 50mm 1.4. The best adapted lens I've used on the GFX. I like the 35mm too because of the 28mm FF equivalent field of view. Here are 2 recent images w/ the 50mm

https://flic.kr/p/2sg3g5g

https://flic.kr/p/2sfWPhP



Jun 04, 2026 at 07:26 AM
RoamingScott
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p.5 #5 · GFX100S worth it if ONLY planning to use adapted lenses?


This thread got a lot more interesting, good job guys.


Jun 04, 2026 at 09:39 AM
tsdevine
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p.5 #6 · GFX100S worth it if ONLY planning to use adapted lenses?



Here are shots from the Voigtlander APO-Lanthar 125mm f/2.5 Macro using the Fringer EF adapter on a GFX100S II, FWIW. Towards MFD you get some hard vignetting, but for a lot of shooting, it's not a problem.

https://www.flickr.com/photos/timdevinephotography/albums/72177720334021485



Jun 04, 2026 at 10:52 AM
SGinNorcal
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p.5 #7 · GFX100S worth it if ONLY planning to use adapted lenses?


There seems to be a bit of interest in the Canon EF100-400L II adapted to Gfx. I have some time with this combo so I went back through my C1 catalog sorted by focal length to look at where I see could vignetting and severity of it. It varies most by aperture. All shots at F11 were completely vignette free. At F9, there was typically some light vignetting in the corners but oddly, better at or closer to 400mm than 300. At F7.1 and F8, there is light vignetting at all FL's. At 5.6 and 6.3, the amount of vignette was still small and in the corners only but much darker. I should note that all of these are with the baffle removed. With it in, you get quite a bit more vignette all the time and its easy to remove the baffle without tools.
At some point, Roaming Scott suggest automating a light crop to take the effort out of applying crops with this lens. I like the idea, just don't know how to accomplish with C1.
I originally got this lens to supplement the reach of the GF100-200 but I found the combo of the EF100-400 and Contax 645 140/2.8 pretty much put the 100-200 on the shelf for me. So I ultimately traded away the 100-200. I've since added the GF110 and 250, both are stunners.



Jun 04, 2026 at 01:34 PM
RoamingScott
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p.5 #8 · GFX100S worth it if ONLY planning to use adapted lenses?


SGinNorcal wrote:
At some point, Roaming Scott suggest automating a light crop to take the effort out of applying crops with this lens. I like the idea, just don't know how to accomplish with C1.


Blame CGPT if this doesn't work, I don't use C1 and can't test it. Doesn't seem like you can truly automate it based on camera type like you can in LR, but close enough.

Step 1: Save a Fixed Crop Position and Size

If you want every image cropped to the exact same pixel coordinates or relative position:

Open an image.
Apply the crop exactly as desired.
Go to Adjustments → Styles → Save User Style...
In the dialog, select Crop (and only Crop if that's all you want).
Save the style.

When applied to other images of the same dimensions, Capture One will attempt to apply that exact crop.

Step 2: Apply saved style on import

Open the Import dialog.
In the Adjustments section, choose your crop style under Styles.
Import the images.

Every imported image will have that crop applied automatically.



Jun 04, 2026 at 01:41 PM
 


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gdanmitchell
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p.5 #9 · GFX100S worth it if ONLY planning to use adapted lenses?


With the frequent interest in the EF 100-400mm lens (a fine one on FF), despite the need to deal with some vignetting, the need to remove the baffle, and the need to use an adapter, wouldn’t it be great if Fujifilm would offer something like a 200-500 lens for GFX?


Jun 04, 2026 at 01:58 PM
RWNPhoto
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p.5 #10 · GFX100S worth it if ONLY planning to use adapted lenses?


gdanmitchell wrote:
wouldn’t it be great if Fujifilm would offer something like a 200-500 lens for GFX?


I don't think they can.




Jun 04, 2026 at 06:52 PM
ruthenium
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p.5 #11 · GFX100S worth it if ONLY planning to use adapted lenses?


I re-read the opening post, to get a better understanding of the question posed there.
I don't think I fully understand this particular case.
Here is my reflection on several points:

1) "I'd like more resolution and IBIS which led me initially to considering the X-T5."
For a photographer who "nearly always reach for the G9" (a micro-four-thirds body) migrating to a 102MP GFX is a bold move. If this photographer "despises post processing", then my immediate concern is whether the OP is prepared to deal with the large files from the camera.
102MP gives "more resolution" with the native GF lenses, and allows liberal cropping, but this assumes both using the native glass and doing some minimal post-processing.
If one is a LR user, then acquiring enough storage for the mandatory catalogue to hoard the large GFX RAF raw files is another consideration.

2) "I am basically starting from scratch with any system I choose... However, it has come to my attention that getting set up with an X-T5, 8-16WR, 16-55WRII, and 70-300WR will cost very nearly as much as a GFX100S, Fringer adapter, EF16-35 LIII, EF24-70 LII and EF100-400 LII."

I don't understand the logic of starting from scratch with the GFX100 body and buying several Canon lenses.
This is like starting from scratch and purchasing a high-end Sony camera, and investing into a collection of Nikon lenses.
What should be the total cost of "Fringer adapter, EF16-35 LIII, EF24-70 LII and EF100-400 LII"?

3) "I mainly shoot landscape with some architecture"
Then, perhaps the smartest way to start with a GFX is to add the body with the GF20-35mm F4 lens.
This can be cropped to FF 35mm, and further to 50MM (nearly an APS-C crop from the FF crop) that should still give you 32MP in the crop.
Thus, this lens on a GFX100 body covers the full-frame range from 16mm to 50mm (when one is comfortable with the idea of cropping).

4) "the main drawback to GFX is the weight - 4300g vs 3400g for Nikon Z or only 2350g for Fuji X"
This suggests that the OP is considering carrying the entire lens kit and the camera when shooting - that sounds unusual to me; however, I can imagine that different photographers have different needs and interests.
Traveling with 3 - 4 kg of camera gear is not unreasonable; however, carrying all the lenses at once is rarely needed (from my personal point of view, of course).



Jun 04, 2026 at 10:59 PM
gdanmitchell
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p.5 #12 · GFX100S worth it if ONLY planning to use adapted lenses?


You are on to my initial questions about the suitability of the GFX system to this particular user’s (somewhat confusing) use case, questions I tried to raise in my initial post in this thread. A shortened version of my view was that while the GFX system is ideal for some users it did not seem to be to be a good fit for his use case, based on his own criteria — better options exist for him.



ruthenium wrote:
I re-read the opening post, to get a better understanding of the question posed there.
I don't think I fully understand this particular case.
Here is my reflection on several points:

1) "I'd like more resolution and IBIS which led me initially to considering the X-T5."
For a photographer who "nearly always reach for the G9" (a micro-four-thirds body) migrating to a 102MP GFX is a bold move. If this photographer "despises post processing", then my immediate concern is whether the OP is prepared to deal with the large files from the camera.
102MP gives "more resolution" with the native GF lenses, and allows
...Show more

Edited on Jun 05, 2026 at 03:48 AM · View previous versions



Jun 05, 2026 at 01:08 AM
tuomkok
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p.5 #13 · GFX100S worth it if ONLY planning to use adapted lenses?


ruthenium wrote:
I re-read the opening post, to get a better understanding of the question posed there.
I don't think I fully understand this particular case.
Here is my reflection on several points:

1) "I'd like more resolution and IBIS which led me initially to considering the X-T5."
For a photographer who "nearly always reach for the G9" (a micro-four-thirds body) migrating to a 102MP GFX is a bold move. If this photographer "despises post processing", then my immediate concern is whether the OP is prepared to deal with the large files from the camera.
102MP gives "more resolution" with the native GF lenses, and allows
...Show more

I agree with you - the opening post was interesting.

Why did not the guy simply buy a high resolution Canon body where adapting the lenses would be easy? Or the new Sony A7rVI if maximizing image quality is priority. 100mp GFX sensor is same pixel density as Sony 60 FF sensor. Using FF lenses, the GFX sensor will not be used fully.






Jun 05, 2026 at 01:17 AM
zhangyue
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p.5 #14 · GFX100S worth it if ONLY planning to use adapted lenses?


My reply is really for the thread title. I guess it is more useful for others in additional to OP. The answer from me is solid “yes.” And that is the reason I buy GFX system.
larger sensor trade off is always system size, speed and AF vs output flexibility and IQ. The later is more important for photography I enjoy.
You either use its resolution, Dynamic range, almost 1 stop of DOF, different format or used for any lenses I enjoyed at different platform. This is the center piece for my photography. EVF adapter is a cherry on top, may not apply to gfx100s though.



Jun 05, 2026 at 08:36 PM
SGinNorcal
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p.5 #15 · GFX100S worth it if ONLY planning to use adapted lenses?


RoamingScott wrote:
Blame CGPT if this doesn't work, I don't use C1 and can't test it. Doesn't seem like you can truly automate it based on camera type like you can in LR, but close enough.

Step 1: Save a Fixed Crop Position and Size

If you want every image cropped to the exact same pixel coordinates or relative position:

Open an image.
Apply the crop exactly as desired.
Go to Adjustments → Styles → Save User Style...
In the dialog, select Crop (and only Crop if that's all you want).
Save the style.

When applied to other images of the same dimensions, Capture One will attempt to apply that
...Show more

Turns out that was pretty easy. Set it up as a Style selectable or not when either importing or starting the edit process. I will consider similar for any repetitive processes, C1 is very configurable. Thanks Scott



Jun 06, 2026 at 12:26 PM
diytech
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p.5 #16 · GFX100S worth it if ONLY planning to use adapted lenses?


I was in a similar boat but more on a GAS side. I was a Fuji X shooter. Went to Sony briefly, then to Nikon Z and Fuji itch was back. So gota GFX 100S here and few lenses - GF 35-70, 45,. And based on a FM member I tried Tamron 35/45/85 1.8 lenses. Pleasantly surprised to see the quality with the adopted EF glass. Z8 and GFX 100S are more or less same, but GF glass is chunkier than Z glass but not much. GFX better in camera bags than my z8 with its EVF hump. But man, the quality of a GFX photo draws you into the picture unlike any other. That’s the defining quality of GFX.


Jun 06, 2026 at 01:13 PM
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