Canon ER-hE Eyecup

That 360° rotating design makes a huge difference when I switch between horizontal and vertical shots—no more awkward twisting. It hugs the eye nicely too, blocking out all that side light on sunny days.

The rotating mount clicks into place perfectly for low-angle bird shots, and the asymmetrical shape really cuts out glare when I'm tracking fast subjects. It’s a snug fit on the R3 and stays put even after hours of hiking.

I shoot mostly vertical portraits, and the asymmetrical shape on this eyecup really seals out the glare from overhead lights. It stays firmly twisted into whatever angle I need without loosening up during a long session.