The file 'Eyepiece Adapter For Canon EOS R3 To Canon ERC-E5 Raincover 3D Printer Model' is (stl) file type, size is 19.5KB.
The Canon ERC-E5 raincover comes with two Adapter pieces for DSLRs that are sadly both to small for the EOS R3.
While waiting for the customer Service to come up with a solution I iterated 16 prototypes using OpenSCAD until I came up with this.
Prints fine with brakeaway support on my Bambulab X1C in PLA carbon and seems to hold without the actual latches of the original part.
r3eyepice.stl | 93.1KB |