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I note that your screws have splines on the side. I would find a strip of soft material like a plastic (hot melt glue stick or some similar soft plastic) or wood (a softwood) and drill two holes in it exactly the distance apart that the screws are, then push the stick onto the screws. The holes should be slightly smaller than the outer diameter of the ...


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The screws help to hold the lens adjustments from being changed. You would want them loose to change your adjustment and then to tighten the screws to hold the changes that you made for different lighting or subject positions. Instead of glue to hold the screw positions, why not use a wide elastic band (shown in pink) around the lens (in black) covering the ...


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Using fingernail polish has the benefit that it can be removed with acetone (fingernail polish remover) and reapplied if it wears away or loosens. LockTite (cyanacrylate) is more stable (difficult to remove) and will lock the screw and threads rather than tighten them. It's an adhesive. Activators will make a bond between surfaces more stable strengthening ...


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