Promaster L-Mount 後鏡頭蓋（Panasonic、Leica、Sigma）

Fits perfectly snug on my Leica SL lens, no wobble or looseness when I slide it on. The grippy texture makes it easy to twist off even with cold hands, and it's kept the rear glass dust-free since day one.

Snapped this onto my Sigma 45mm and it fits perfectly, with a satisfying click that feels secure. The plastic is thick enough to give me confidence it won't crack in my bag. Simple and does exactly what it should.

I’ve been using this cap on my Sigma lens for a few months, and the dust seal is tight enough that I never worry about the rear element getting dirty. The twist-lock action is smooth and secure, which makes swapping lenses on the go much faster.