Canon ER-KE Large Eye Cup For EOS R5 Mark II

The rubber is firm enough to stay put but pliable against my glasses, and it does block stray side light noticeably when I shoot near windows. Eye relief feels exactly the same as the stock cup, which is what I wanted.

The ER-KE fits snugly on the R5 Mark II and does exactly what it’s supposed to—shooting into harsh backlight no longer washes out my viewfinder. Even with my glasses on, the stray light from the side is completely blocked. Solid upgrade over the stock cup.

I wear glasses and was worried about stray light ruining my shots, but this eyecup blocks it out perfectly without pressing my frames into my face. It snaps on securely and makes the viewfinder much more usable in bright sunlight.