A. Please download the 645AF/AFD/AFD II Feature Comparison chart to see all of the differences between these three models.

Q. What are the main differences between the AFD and the AFD II?

A.   The controls for self-timer, mirror-up, auto-bracketing and multi-exposure have a different arrangement on the AFD II than they do on the AFD.  There is also a choice of ½ or 1/3 stop increments with apertures and shutter speeds as opposed to only ½ stops on the AF/AFD.  The AFD II will also focus slightly faster than the AFD, and it has 36 custom functions that let you configure various operations of the camera.

Q. What is changed when you have the 645AF upgraded to the AFD II?

A. By upgrading the 645AF, you will be able to use the Mamiya ZD and other brands of Digital backs. For a complete list of upgrade features, please download the 645AF/AFD Upgrade Features Chart.

Q. Is the original 645AF camera able to work with digital backs, or only the AFD/AFD II?

A. The AFD and AFD II accept digital backs made by Mamiya, Leaf, Phase One, and Kodak. The original AF works with some of the earlier backs from Kodak, Megavision and several others. Only the AFD/AFD II, with the MSCE feature (Mamiya Serial Communication for External) can communicate with the current generation of digital backs and display information on the camera’s LCD screen and in the finder. A 645AF camera may be upgraded to an AFD by the Mamiya Service Dept. For more details, download the 645AF/AFD Upgrade Features Chart.

Q. What accessories and lenses from my manual focus 645 system may I use with the 645AF, AFD or AFDII?

A. You can only use the lenses. However, they will not stop down automatically. When using the manual focus lenses on the AF cameras, do the following. . .1) Set "A/M" switch on lens to "M". 2) Rotate the f/stop ring to the maximum aperture for composition and focusing - focus confirmation in viewfinder will work. 3) Set desired aperture and release shutter.  Stop-down metering in aperture priority mode is also possible.

Q. What flash works best with my 645AF, AFD or AFDII?

A. The camera will work with almost any flash made. If using a unit dedicated to another brand of camera, make sure the flash is in a "manual" setting or damage to the flash and/or camera may occur. If you wish to have TTL flash metering, use one of the Metz, Quantum or Lumedyne units with the proper module(s).

Q. Can flash and ambient exposures be set separately in TTL mode?

A. Yes. You can adjust your TTL flash exposures separately from the ambient exposure. The range of adjustment can be three stops over or under the ambient light. The original 645AF does not have this function.

Q. Why am I getting such wide apertures in Program (P) mode indoors with flash?

A. In "P" mode when using flash, the camera will adjust exposure for the ambient light whether or not flash is being used. The shutter speeds will be limited to 1/60 and 1/125 (AFD/AFDII only, the original 645AF will permit slower speeds), which will result in the camera selecting a wide aperture in an attempt to obtain a correct exposure. Indoors, the use of the "X" setting will prevent this. If the flash’s output is controlled by either the camera’s TTL system or an on-flash thyristor, a correct exposure should result at the "X" setting’s 1/125 sec. shutter speed, assuming the aperture is manually set to the proper f/stop.

Q. My AFD is set to Av mode, I am indoors with flash, but my shutter speed is very slow. Why is this happening?

A. Like the "P" mode, the camera is attempting to make an ambient exposure. The difference with the AV mode is that the shutter speed will be set as low as necessary for a correct ambient light exposure, instead of being limited to 1/60 like in the "P" mode. The solution here is the same as for the "P" mode, set the camera to "X" and manually choose an aperture; the TTL flash system will give you a correct exposure.  The AFD II will limit the camera to 1/60 or 1/125 in this setting.

Q. What is the maximum distance at which the supplemental focus assist beam will work?

A. 30 feet.

Q. My 150mm lens will not auto focus, what is wrong?

A. This lens (along with the 28mm, 35mm, 55-110mm, 105-210mm, 75-150mm, 210mm and 300mm) has a built-in clutch system to switch from auto to manual focus. Grab the focus ring and pull it forward until the words "Auto Focus" appear from under the ring.

Q. Does the magazine retain ISO and frame number information after being removed from the body?

A. Yes, the battery in the magazine supports its memory.

Q. Am I able to test fire the camera without film loaded?

A. Yes. Make sure that you have the back door open and dark slide removed.