Baffled Lens Hood
thingiverse
Original is 84mm interior. So divide the external diameter of your lens by 84 and use that number for scaling. Example, 51mm lens 51/84 = 0.6, so scale to 60%. There is no tolerance between the inserts and the lens hood, so best to print the inserts at 99.5% to 99.7%. Best used on longer lenses to reduce stray light.
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