ソニー (ALCR55) ソニーAマウントレンズ用リアレンズキャップ

Finally found a rear cap that clicks on securely without that worrying loose feel. The fit is precise for my A-mount lenses and it feels sturdy enough for daily use.

Picked this up for my old Minolta lens and the spring-loaded latch clicks into place perfectly every time, no wobble at all.

Finally, a rear cap that fits my A-mount lenses without any wobble or forcing—the bayonet locks in crisp and tight. It's lightweight, so it doesn't add bulk when I toss a spare lens in my bag.