Canon EFS lens cap
thingiverse
A cap for the back of an EFS compatible lens is designed in the style of original Canon lens covers. Ensure your printer is calibrated as this model has a tight fit. Procedure includes (1) printing the design, (2) attempting to fit it onto a lens, and if necessary, filing the cover slightly for a snug fit; however, refrain from using force to avoid damaging your lens.
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