ProMaster リアレンズキャップ

Finally, a rear cap that snaps on securely without feeling loose—no more worrying about dust getting in during lens swaps. The fit is precise and snug, exactly what I needed for protecting the glass when it's off the camera.

The click when this seats onto the lens is so satisfying, and it covers the rear element completely so I never worry about dust sneaking in during bag swaps. It’s a simple thing, but the fit is snug without being a fight to get off.

I’ve been using these caps for years and the textured grip makes them easy to twist on even with cold fingers. No more dust getting on the rear element during lens swaps.