D7000 Metering Problems with Tamron Mirror Lens
Hello. A few years back I bought a Tamron SP 500mm f/8 55BB mirror lens but never really used it.
Today I attached it to my D7000 and it took some decent practice pictures, but the camera body reads that it took them at F2. My understanding is that the Tamron lens is fixed at F8. I tried it on Aperture Priority as well as Manual and it either reads an aperture of F2 or no F stop at all.
I was wondering if anybody else has experienced this problem with this lens and has a suggestion and/or explanation.
Thanks for your help. . I am a rank beginner.
#1. "RE: D7000 Metering Problems with Tamron Mirror Lens" | In response to Reply # 0briantilley Nikonian since 26th Jan 2003Sat 28-Jul-12 07:48 PM
Welcome to Nikonians, Tim!
Modern lenses have a CPU chip in them, that communicates with the camera and allows the two to work together. Older lenses, almost certainly including your Tamron, lack this chip - so using the menus you need to tell the camera a bit about the lens first, like its maximum (or in this case, only) aperture.
Page 159 in the D7000 manual explains where to start
#3. "RE: D7000 Metering Problems with Tamron Mirror Lens" | In response to Reply # 1blw Nikonian since 18th Jun 2004Sun 29-Jul-12 06:24 AM
(The other) Brian is 100% correct. I have this lens and it is definitely f/8. Your camera, however, has not been so instructed, so it just shows the last maximum aperture that was set, which apparently was f/2.
Brian... a bicoastal Nikonian and Team Member
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