ProMaster 後蓋鏡頭 – L 接環 (Panasonic、Leica、Sigma)

The click-lock is reassuringly snug on my Sigma 24-70, and the interior felt lining gives me peace of mind about scratches when swapping lenses in the field.

I was worried about the plastic feeling cheap, but this cap snaps on tight and stays secure even in my bag.

Finally, a rear cap that clicks on with authority instead of that vague half-turn feel. The rigid plastic construction gives me confidence it’ll hold up in my bag.