This FotodioX Pentax 645 to Canon EF-Mount Adapterfrom FotodioX Pentax 645 to Canon EF-Mount Adapterenables the use of your Pentax 645 lenses on Canon EF-mount DSLR cameras. It features a durable brass construction with stainless steel finish, a leaf spring ensures a secure connection between the lens and adapter, and its design also maintains infinity focus.

Pentax 645 Lens to EF-Mount DSLR    Maintains Infinity Focus    Leaf Spring Mount Design    Brass with Stainless Steel Finish

This manual adapter does not maintain automatic lens control between the camera and lens; aperture priority or manual shooting modes should be used, as well as stop-down metering for exposure control.

Related Questions and Answers

Q: 1. The reviewer states that the camera's shutter and not the lens's shutter is used. Can you provide additional operating details?

A: The leaf shutter has to be open in order to use this adapter.

Q: 2. Is nikond7100 right for a pantax af

A: I am not sure I understand your question exactly, but if you mean:Will your Nikon d7100 be able to auto focus your Pentax lens using this adapter? the answer is, No. If you are asking is this the right adaptor for your pentax AF lens? then Yes. Pentax has not changed their lens mounting type (645A) since the original 645 came out in 1984. They have created the 645A, 645FA, 465FA2... lenses, but the difference is only the addition of autofocus contacts and not the flange distance. If you look up their latest camera the Pentax 645Z the specs say it is compatible with a a 645A style lense. So, all that to say if you are trying to put a Pentax 645 lens on a Nikon F mount then this adaptor will get it done. I purchased the Canon FD to Nikon F adaptor and it works for the most part. I have a few lenses where the back focus is not correct, but other than than it works fine if you don't mind manual focusing.

Q: 3. Does "maintains infinity focus" mean that it can only be focused on infinity?

A: It means you have adjustable focus up to infinity. Some adapters can't

Q: 4. I am trying to wrap my head around the crop factor of this. Will my 80mm normal lens look and function like an 80mm normal lens on the 645z or is there a crop factor involved?

A: Yes! There is a crop factor - not because of the lens - but because of the 645z sensor. Pentax has a good chart of the lens comparisons to 35mm full frame. it was helpful to me at first - but now am used to the lenses. Remember - you will have a manual focus and manual f/stop down when using the Hassy lenses on this camera.

Q: 5. If a 200mm 645 lens (original manual focus) is mounted on a Canon 5D II what magnification (or reduction) will result?

A: There is a crop factor of .78 so a 200mm 645 lens on a full frame 35mm DSLR is going to be around 256mm.

Q: 6. will i be able to use my contax 645 T lenses on my canon 1ds mark III?If yes, is this the best adaptor for my situation?

A: Yes, you will be able to use Contax 645 T lenses on EF mount Canon camera bodies with this adapter. This will be the best option, just note that automatic lens functions will not be retained with the use of this adapter such as autofocus.

Q: 7. Is that a tripod mount on the adapter?

A: Yes. The FotodioX Pro Mount Adapter for Pentax 645 Lens to Fujifilm G-Mount Camera has a tripod foot for added support when adapting the lens.

Q: 8. Re: FotodioX Pro Lens Mount Adapter for Pentax 645 Lens to Canon EFJust wondering, anyone know how well this this adapter fits the Pentax lenses? I bought a different brand from a local dealer, but the slightest touch of the release button and the lens comes off!I'd like to know if the FotodioX one is more secure.Thanks.

A: B&H does not pay me for my help. go search it.

Q: 9. do you attach adapter to pentax645 z first OR you attach Hasselblad lens to the adaptor.?

A: attach lens to adapter first!

Q: 10. will this work with canon 5d mark 3? And will this work with Mamiya 645 AF lenses?

A: I use it to attach my Mamiya 645 lenses to my Canon 6D, the baby-brother of the 5DM3, and it works fine. It's not as perfect as having it hooked up to your Mamiya, but it never will be. But you will unlock the greatness of a medium-frame format lens onto a full-frame 35mm equal and the results are like nothing you can get from a Canon lens. I'm not saying superior, but in many ways, they're up there with the traditional L lenses, and if you bought the Mamiya lenses used, you probably didn't spend the L prices. Good luck.