Bahtinov Mask for RF 16mm f2.8

This is designed to fit the RF16mm. 
There's two small tooth that would allow you to twist it into the lens hood notch on the lens.
Enable support for those two protrusion – it'll extremely easy to remove given how small they are. 

Text are added in PrusaSlicer, and not part of the model. 

Note: The lens assembly extrudes out of the lens when it's focused to the near field. For thickness' sake, this mask DOES NOT accommodate that entire range of motion. Focus to something near infinity first before putting it on.