This FotodioX Pro Lens Mount Adapter allows a Pentax 645-mount lens to be used on a Canon EF or EF-S mount camera. It is designed to support focusing to infinity, is constructed from brass as well as aluminum-alloy, and utilizes a brass lens mounting ring to provide a durable, yet lightweight camera-to-lens connection.

A Generation v10 chip built into the adapter enables focus confirmation within a Canon EF or EF-S mount camera when used with a Pentax 645-mount lens. This feature allows focus to be quickly and accurately achieved through a compatible camera's viewfinder or live view feature.

Pentax 645 Lens to EF/EF-S Body    Enables In-Camera Focus Confirmation    Supports Focusing to Infinity    Brass and Aluminum-Alloy Construction    Brass Lens Mounting Ring    Locking Mechanism to Secure Lens    Push-Button Lens Release

• Allows a Pentax 645-mount lens to be used on a Canon EF or EF-S mount camera
• Built-in Generation v10 chip enables in-camera focus confirmation
• Attached lens can focus to infinity
• Constructed from brass and aluminum-alloy
• Utilizes a brass lens mounting ring to provide a lightweight camera-to-lens connection with enhanced durability
• Locking mechanism for secure attachment of lens with push-button release

Related Questions and Answers

Q: 1. Is this compatible with FL lenses (It's already known that an FL lens will fit on an FD mount body but maybe there's some peculiarity)?

A: Yes, the FotodioX Pro Lens Mount Adapter with Generation v10 Focus Confirmation Chip is designed and made for Canon FD Lens to EF/EF-S Body types.

Q: 2. Would the auto focus work when used w Canon 6D Mark II and the Sony Planar T* 50mm f/1.4 ZA SSM Lens?

A: I'm sorry, no, this is a manual focus converter only. The focus confirmation chip is for when manually focusing, a light comes on and tells you when its in focus.

Q: 3. Will this allow for aperature change in camera? using this for a bmpcc 4k to canon adapter.

A: It will not. This does not allow you to control the aperture.

Q: 4. Does the 1.4 lens means that the converter crops a lens to 1.4? So a 28mm becomes a 40mm approximately? Or is the intenral 1.4 lens just for focusing?

A: Yes, the 1.4x is a crop factor.

Q: 5. Compatibility with EF Lenses/Full Frame Camera Bodies?

A: This adapter is only compatible with APS-C bodies.

Q: 6. Would this work with a canon 1ds mark II?

A: Yes, the FotodioX Pro Lens Mount Adapter listed above would be compatible for use with the Canon EOS 1DS Mark II DSLR camera. Do note that this is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted. However, as the adapter does contain a Generation v10 Focus Confirmation Chip, you will be able to confirm focus with a green dot in the viewfinder and an (optional) audible beep.

Q: 7. Do you lose a stop of light with this adapter like you would a telephoto converter?

A: It has a slight loss of two-thirds of a stop.

Q: 8. Wil Canon FD Lenses (Breech-lock) FD 70-210mm F4, FD 50mm F1.4, FD 28mm F 2.8 work correctly with this adapter?

A: Yes, the FotodioX Pro Lens Mount Adapter with Generation v10 Focus Confirmation Chip for Canon FD-Mount Lens to Canon EF or EF-S Mount Camera will support Canon FD lenses with breech-lock.

Q: 9. this adapter will work on 5d m iv?

A: Yes, FotodioX Lens Mount Adapter with Generation v10 Focus Confirmation Chip for Nikon F-Mount Lens to Canon EF or EF-S Mount Camera will work on a Canon EOS 5D MIV.

Q: 10. Does this have to be programmed for the lens it is being used on?

A: No this does not have to be programmed for the lenses it is going to be used with.