Ttl Extension
by admin on Sunday, August 16th, 2009 | No Comments
My (Mamiya 645) 50mm doesn't appear to stop down! What's wrong?
When it's on the camera, the TTL meter recognizes it. But off the camera when I turn the f/stop ring, I can't see the aperture stop down!
I first noticed this when working with my newly purchased extension tubes. When I have my 150mm attached, the automatic depth of field of field works fine. But for whatever reason, when I had the 50mm attached, I can't get the automatic depth of field preview!
Am I a total moron and missing something obvious or is my lens defective?
Any help solving this puzzle is greatly appreciated!
Put the lens on the camera without the tubes. Set the lens to f16 and fire the shutter at a slow speed. Look into the lens. If the aperture doesn't close down, it's broken.
MC68HC908GP32 - COMUNICACION SERIAL RS 232 - AD -SCI
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