Question about Pentax ZX-M with 28-80 lens 35mm Film Camera

2 Answers

Pentax mz-7 If I want to buy a zoom or macro lens, do I need a K type fitting?

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The "K" mount defines the basic mechanical bayonet mount. However, the K-mount has no electrical contacts that allow the lens to communicate exposure information back to the camera body. Nor does it have the drive mechanism for autofocus.

A K-mount lens will fit on the MZ-7, and it will work in manual and aperture priority modes if you focus manually. Shutter priority, program mode and auto focus will not function.

In the mid 1980's, "KA" lenses added the electrical contacts that allow the lens to communicate exposure info to the camera body. A KA-mount lense will fit on the MZ-7, and it will permit all exposure modes to function. However, autofocus will not function.

"KAF" lenses added the autofocus drive mechanism. A KAF-mount lens is correct for the MZ-7 and allows all the exposure modes and autofocus to work.

If you find an old K or KA mount lens that you like, you can buy it with confidence that it will fit the newer camera. And it will take pictures, function within it's limitations rather than supporting the camera's greater capabilities. It's just that some of the newer camera's functions that may not work with the old lens.

Good luck,
Tim

Posted on Oct 28, 2008

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Yes the mz-7 Definitly uses a K mount.

Posted on Sep 10, 2008

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