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Topcor 58 Macro: What is this ring?
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PostPosted: Wed Jan 26, 2022 9:05 pm    Post subject: Topcor 58 Macro: What is this ring? Reply with quote

What is the purpose of this silver ring?

It just seems to sit there. It will just pop off.

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PostPosted: Wed Jan 26, 2022 9:16 pm    Post subject: Reply with quote

Guessing...perhaps a spacer not being used, which would be moved to other side of front group if necessary for proper calibration.