[Metal, Brass] I'm only using lenses that are manual with no electronics so I felt no need to buy the more expensive Fuji adapter. I put a Leica Summicron 35/f2 on my X-T30 II and it works great.

[0.6 lb] I got this in order to mount a few different Leica lenses to my Fujifilm GFX camera. The mount attaches snugly with no loose connections. Images are great. Overall, I am very happy with it.

[0.6 lb] Purchased this to use a TTArtisan 28mm f5.6 Leica M-mount lens on my Fujifilm Xpro 3, and it works great. Fit onto my fuji body is great, smooth attachment. Attaching the lens to the adapter is a more snug fit, however, it is completely manageable. I'd rather have a snug fit that a loose one. This adapter is at a great price point, it's pretty reduced in size and isn't an eye sore on the camera body. Great product, very satisfied.

[0.6 lb] Perfect to have seamless L adapter on my Fuji GFX 100 and even can use the all top ranking performer LEICA APO-MACRO-ELMARIT-R 100 f2,8so high class and sharpest ever

[0.6 lb] The FotodioX M-to-X adapter works great. On both sides (camera body, lens) the fit is excellent with no rattling or light leakage. I'm using this on a Fuji X-T2 (mirrorless), so it is hard for me to be certain, but I'm not losing any significant light when using this adapter and sharp focus is achievable. I have used the adapter with a variety of M-mount lenses from Leica, Zeiss and Voigtlander and have had not problem.

[Metal, Brass] A long time ago, I found a Minolta CLE with a Zeiss Wetzlar Summicron-C 40mm f2 lens in a thrift shop... for only $3. I ordered this adapter so that I could try the lens on my X-Pro1. And the lens/adapter combo  looks like it was MADE to go with the camera, and it works beautifully. I tested it on a late sunset sky, and the old lens (despite its total manual controls) seems to resolve subtle changes in cloud/sky colors better than do Fujis own fully-automatic lenses (check the darker sky tones above the bright sunset in the attached photo). I should try shooting both configurations under manual control... see how they compare then! I now know what the Leica Look looks like... and adore using this oldie but goodie on my X-Pro1.

[0.6 lb] Works as it should. I've tried 50mm summilux, 90mm elmarit-m (has the best coverage), 28mm elmarit-m, 35mm voigtlander on my Fuji 50R. It's cliche to say, but with the GFX sensor, it's got more character than native lenses if one thinks that the native lenses give too clinical a look to images. Shot wide open on any of the 3 lenses, the bokeh is creamier.

[FUJIFILM G] An absolute must-have for any FujiFilm user with access to any vintage lenses with the Leica M mount. Works perfectly, has excellent build quality, and looks great on the camera.

[FUJIFILM G] Mine wasn't working great at first. I reached the people at Fotodiox and they kindly recommended for me to update to the latest firmware which is easy as can be. After that it works amazingly good and just like a charm. Very very fast focusing -of course not as fast as native Fujinon lenses- but amazingly fast on my X-T4 with a Leica Summaron 35mm 3.5. It has new features that give these kind of legacy lenses new life and possibilities. I can now focus extremely close with my Summaron and it works fast enough for street action and snapshooting all around. I am really amazed by this adapter.

[FUJIFILM G] The FotodioX Pro PRONTO Autofocus Adapter worked as advertised on my Micro Nikkor 105mm 2.8 and my Nikkor 50 mm 1.4 prime lenses. It struggled with both of my zoom lenses. I needed to purchase the FotodioX NIK-L/M adapter for my Nikkor glass. The FotodioX website denotes both of these cautions in the products description details. Thus far my greatest success has been in bright sunshine; I have not tested the unit with flash photography. When I have secured proper photos I will add them to this review.