cross-posted from: https://mander.xyz/post/46692453

Is anyone familiar with old Sigma Mini-Wide II (Version 2) lenses?

This one appears to have some kind of oil or residue between—from what I can tell—the two front glass elements. It’s difficult to show exactly, but I’ve attached photos looking through mount end.

I’ve been searching for ways to inspect or clean the lens by dismantling it, but only found a video for the old Mini-Wide (Version 1).

From what I can tell, the front element isn’t removable on this second generation, but I wanted to reach out to the community for any thoughts, suggestions, or referrals to other groups.