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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
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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 sometimes 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.)



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
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