The Pro Lens Mount Adapter Kit for Contax 645-Mount Lens to Fujifilm G-Mount Camera from FotodioX includes two adapters, one of which allows a Contax 645-mount lens to be used with a Canon EF or EF-S mount camera, while the other adapter allows a Canon EF or EF-S mount lens to be used on a Fujifilm G-mount camera. When combined, the two adapters allow a Contax 645-mount lens to be used with a Fujifilm G-mount camera.

Together, as well as individually, these adapters are designed to support focusing to infinity. The FotodioX Pro Lens Mount Adapter for Contax 645-Mount Lens to Canon EF or EF-S Mount Camera and the FotodioX Pro Lens Mount Adapter for Canon EF or EF-S Mount Lens to Fujifilm G-Mount Camera are constructed with brass. Both adapters also feature stainless-steel lens mounting rings to provide a durable, yet lightweight camera-to-lens or camera-to-adapter connection.

These adapters do not support electronic communication between an attached camera and lens. To control the amount of light that enters a Fujifilm G-mount camera when using this adapter kit, or a Canon EF or EF-S mount camera when using the compatible adapter and a Contax 645-mount lens, an iris is built into the Pro Lens Mount Adapter for Contax 645-Mount Lens to Canon EF or EF-S Mount Camera. This iris allows for approximate adjustments of brightness as well as depth-of-field along with a connected camera set to manual mode.

When removed from a compatible Canon camera, the aperture diaphragm on a Canon EF or EF-S mount lens is designed to open to its widest setting. A Canon EF or EF-S mount lens may be effectively used with its aperture diaphragm fully open along with the Pro Lens Mount Adapter for Canon EF or EF-S Mount Lens to Fujifilm G-Mount Camera. Otherwise, an aperture value on a Canon EF or EF-S mount lens may be set by first placing the lens on a Canon EOS camera and then pressing the camera's depth of field preview button while removing the lens prior to placing it on the adapter.

Contax 645 Lens to Fujifilm G Body    Dual Lens Mount Adapter Kit    Supports Focusing to Infinity    Brass Construction    Push-Button Lens Release    Contax 645 Lens to Canon EF/EF-S Body    Built-In Iris for Aperture Control    Canon EF/EF-S Lens to Fujifilm G Body

• Dual lens mount adapter kit allows a Contax 645-mount lens to be used with a Fujifilm G-mount camera
• Individual adapters allow a Contax 645-mount lens to be used with a Canon EF or EF-S mount camera, or a Canon EF or EF-S mount lens to be used on a Fujifilm G-mount camera
• When adapters are combined or used individually, attached lens can focus to infinity
• Built-in iris for Pro Lens Mount Adapter for Contax 645-Mount Lens to Canon EF or EF-S Mount Camera provides approximate aperture control
• Pro Lens Mount Adapter for Contax 645-Mount Lens to Canon EF or EF-S Mount Camera and Pro Lens Mount Adapter for Canon EF or EF-S Mount Lens to Fujifilm G-Mount Camera are constructed with brass
• Stainless-steel mounting rings for durability
• Locking mechanisms for secure attachment of lens or adapter with push-button release

Related Questions and Answers

Q: 1. Is the 645 format a standard like MFT? Meaning, is the Pentax 645 the same mount as a Mamiya 645? Will this adapter work with Mamiya or Schneider-Kreuznach lenses that use the Mamiya 645 mount on Fujifilm GFX cameras? TIA.

A: The Pentax 645 and Mamiya 645 offer the same film format, but with different mounts for their respective lenses. This adapter accepts Pentax 645 lenses that originally worked on the Pentax 645/645AF medium format film bodies or 645Z medium format digital body.

Q: 2. Can you change the aperture on the lens or stop it down at all?

A: It the lenses you are using have an f/stop ring you can control the f/stop from that. If it does not the adapter has a diaphragm that you can open and close to control the amount of light getting to the camera. The adapter is manual only so it does not transfer any electronics to the camera to control f/stops or autofocus.

Q: 3. Does the aperture priority mode actually work, and is there a difference of focus like on a DSLR if you use a lens it’ll appear in focus but when you take the picture it won’t be because of the different distance to the sensor

A: Aperture priority works but no other function, as there aren't any electric contacts for any other communication. The images should appear in focus before and after a photo is taken. Front or back focus issues does not occur when using mirror-less cameras.

Q: 4. Is there a focus ring on this Adapter ?

A: No, the focus ring is on your lens.

Q: 5. Does the adapter focus to infinity?

A: Yes, the FotodioX Mamiya 645 to Fuji X-mount Pro Lens Adapter allows your lenses to focus to infinity.

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 this a locking adapter?

A: The FotodioX Pro Lens Mount Adapter for Contax 645 Lens to Canon EF-Mount Camera has a leaf spring which ensures a secure connection between the lens and adapter

Q: 8. How does lens aperture work with this adaptor? Can the connected lens only be used at its widest aperture?

A: The adaptor allows you to attach your lens to the camera but all functions such as aperture and focus must be controlled manually by the control rings on the lens. The camera must be switched to fully manual and it's metering will no longer be of any help to you. You can use any aperture you like on the lens and set the camera to any iso and shutter speed. The picture may need to be taken several times until you get the settings right for proper exposure.

Q: 9. will this work with x-Pro1?

A: Yes, it will work with the Xpro1.

Q: 10. Can this be used with the Nikon D90? I have a Vivitar 105mm Macro lens with Yashica/Contax fit will this work with this lens on my D90?

A: Yes, it can be used on Nikon D90, but you do not have light metering nor auto focus. You have to set your aperture and shutter speed manually, using another digital camera to measure light or a light meter for that purpose.