Promaster Eyecup - Canon EF

It clicks right into place on my Canon EF body with no wobble, and the rubber feels sturdy enough to last. Much better than dealing with the flimsy stock piece that always fell off.

I was tired of squinting through a loose eyepiece, but this replacement clicks on firmly and stays put. The rubber is just pliable enough to block stray light without feeling flimsy.

Finally, a replacement that actually snaps on tight and doesn't wobble—the rubber is just firm enough to block out stray light without being uncomfortable.