Focus Lock and micro adjuster
Description
A Bumped Focus Ring Ruined Too Many Astrophotography Exposures So I Created This-Slip On Lock And Micro Adjuster For The Canon 200Mm F2.8 L Usm Ii Lens. It Really Works. I Tested It Taking That Image Of Comet Catalina. I Left Some Room For Velcro Loops To Pad The Lens Barrel. You Also Need 1/4 20 Threaded Rod, Two Lock Nuts And A Furniture Slot Nut.
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