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RE Auto-Topcor Mount
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PostPosted: Fri Aug 23, 2019 1:48 am    Post subject: Reply with quote

A machine shop should be able to mill the groove in the adapter fairly easily and will save the lenses from being modified.


PostPosted: Mon Aug 26, 2019 2:09 am    Post subject: Reply with quote

For those of you who have dreams of using your Topcor lens on a lens turbo speed booster I am here to crush your dreams. The fotasy EF adapter fits great to the Topcor lens. However, the pin that moves with aperture changes is thicker than the adapter and will not mount to a lens turbo or probably any other speed booster. It would have to be ground.