Promaster 鏡頭後蓋 - 適用於 L 接環（Panasonic、Leica、Sigma）

Finally, a rear cap that clicks on without fighting the alignment. The tight fit gives me confidence it won't pop off in my bag.

Finally, a rear cap that actually fits my L-mount lenses without that annoying wobble. The dust seal is snug enough that I don't worry about swapping lenses in a breeze.

Exactly what I needed to keep my L-mount lenses safe when swapping bodies. The fit is snug but not too tight, and the inner ridge grips perfectly without scratching the metal mount. Feels solid and well-made for everyday use.