Looking for Full Frame lenses to adapt to GFX

[Joeyd]

I know, I know it's a medium format camera, but I love the Helios m42 lenses on the GFX 50s ii and they aren't medium format lenses.

I have a Fuji GFX 50s ii that I just bought and recently bought a Mitakon 65mm lens which is built like a tank.I love the lens but it's extremely heavy for me.

Big side note is that I have nerve damage on my left arm & I've been out of photography a bit before I ended up with it. I bought the gfx50s ii with lenses without realizing just how bad the pain was going to be with the heavier lenses. The other option is that I may have to sell my 50sii which I really don't want to do. 

I'm trying to figure out what brands may have the best autofocus/lightweight glass out there to adapt to my 50s ii. I'm also trying to keep in mind with those lenses if I do have to sell the 50s ii I will have to decide wether to stay with Fuji or with another brand. I just don't know if theres a huge difference between all the lenses. Like how much autofocus matters between the lens you use, adapter and then the camera itself. Or if all it mostly relies on the adapter and camera,etc.

 

 

[SailorDan]

I have the Fringer auto lens converter for Nikon F to GFX, and it works quite well. You can only use the Nikon AF-S and AF-P lenses for autofocus; the older AF-D lenses do not have built-in motors and rely on the motor in the Nikon AF cameras, which the Fringer does not have.

I have not used it myself, but I have read that the Fringer adapter for Canon EF works well too.

I use lots of FF lenses on my GFX50R, but they only cover 1:1 format, 33x33mm instead of the full 33x44mm sensor. Also, most of the lenses I use are manual focus M-mount, which are tiny and super-light compared to any of the GFX lenses. I also use Nikon PC lenses, which have a larger image circle, and easily cover the GFX frame, just not with full shift in the horizontal direction. Both the M and PC lenses are manual focus though, so if AF is important, you are more limited.

[thelostkiwi]

I also use a Nikon to GFX Fringer and it works very well. 

24mm f/1.8 vignettes so best used on 35mm mode. 
50mm f/1.8 covers the entire frame very well with no issues and is a superb little lens.
105mm Sigma vignettes slightly but is perfectly usable.
300 f/4 likewise the 105. 

I have a 70-200 f/20+.8 incoming to test so will report back but I'm expecting a little vignetting. 

Even in 35mm mode the image is still 60MP and if you're prepared to manually crop and correct you can get 80-90 MP images. 

I also have a C/Y to GFX adapter. 
The 24mm Sigma Superwide vignettes strongly.
Ditto 28-80 Zeiss Sonnar.
80-200 f/4 Sonnar is perfectly usable.
All work fine as 35mm mode lenses. 

I also have an M42 adapter which I tried with the Carl Zeiss Jena 135mm f/3.5 with good results. 

[Giampaolo Masserano]

I use a TECHART ring to mount Canon EF lenses on the GFX 50S-II and 100S-II, maintaining image stabilization and autofocus.

The only limitation are lenses with a small rear element diameter that make it impossible to cover medium format.

Fast lenses like the EF 85/1.2L or the 100-400L, however, work great.

Edited December 4, 2025 by Giampaolo Masserano

[thelostkiwi]

More testing of lenses today. 

Nikon 70-200 f/2.8 IF ED VR (same applies to VR II) - dreadful. Heavy vignette at all focal lengths and apertures. Obvioulsy fine in 35mm mode. 

Nikon 70-200 f/4 - some vignetting at full frame (similar to 24mm f/1.8 and Sigma 105 f/2.8 so probably correctable or slight crop to 80-90MP). Perfect in 35mm mode. 

If weight is an issue for you the kit 35-70 Fuji GFX lens is lightweight and better than you might expect but isn't a fast lens at f/4.5-5.6 

Edited December 6, 2025 by thelostkiwi