FotodioX Mamiya 645 Lens to FUJIFILM G-Mount Camera Pro Lens Mount Adapter

I read a few reviews where the fit was too tight or too loose. Don't know if it is just the luck of draw or prior issues have been fixed, but my copy of this adapter is a perfect fit. It is smooth going on and coming off. Solid click when locking on and easy, smooth release when taking off. 5 stars.

I have two of these adapters and the most recent on purchased seems to be a little better than the first with its redesigned unlocking mechanism. I can't see spending a lot more something that does essentially the same thing. Built quality is good and for the lenses I use it with I've had no issues with fit on either the camera or the lens.

I tried 3-4 different Mamiya 645 lenses to Fuji G mount adapters, including the expensive (475) Novoflex adapter. I found this FotodioX adapter the best. Here are the reasons: #1, It is well made, with a pretty good fit. It is not perfect, but there is only a barely perceptible play. I'd rather have it that way than it being too tight, which would be wearing out either my lens or my camera mount or both. #2, it comes with its own ARCA-compatible foot for tripod mounting. Don't underestimate this! This is very helpful, especially if you use heavier lenses. #3, the inside of the adapter is finished well in a dark, non-reflective coating, so I don't have any issues with reflections, flare, etc. My use case: GFX100S + Schneider Kreuznach 120mm Tilt/Shift for the Phase One XF camera (which is where the Mamiya line eventually ended up). My only gripe, which is not really a negative: I use the Fuji metal grip that extends the body of my GFX100S and gives me a better grip on the camera. With this on, the tripod foot on the adapter becomes too short - I can't mount it into my tripod without the lower edge of the camera running into an obstruction. So I would need to remove the bottom plate before I can put this on a tripod. I could still mount it with the base plate on, but it won't be centered in the clamp (which BTW, is not a problem, as long as I secure it well). Either way, it is not a big deal, and there is actually a positive side to having a short tripod foot: it leads to better stability. So no complaints. Net-net: I highly recommend it to anyone planning to use a 645 lens with their Fuji G-mount camera.

Bought the forodiox pro mamiya 645/gfx adapter. Rubbish. Lenses hardly screw in and don't lock. So when pulling focus the lens just falls off.

Unable to mount one lens and the ones I could mount would rotate only a fraction of what they should. I kept this until a much better adapter arrived, which took a while during the pandemic. Then I threw the FotodioX in the trash. Save your money and get another adapter, such as the Kipon.

I have use this adapter with a GFX 50R, Mamyia 150mm 3,5 + Mamyia extension tube auto-ext ring No 2 to take macro picture. Even with the added extension tube there are no loose very tight fit. The tripod attachment is solid. I have include a scaled picture. I am very please to be able to use some medium format manual lens with beautiful results.