Hi, so I recently started using my dad's old OM10 to break away from digital (so far I like the idea of film way more actually). When changing lenses today, I found that behind the top of the mirror, there is a little 5mm rubber flap, and it seems that part of that flap is tucked behind the mirror, and the other part is out in front. I don't notice anything on the view finder, but I'm wondering if this is some sort of light seal or something, or if having it somewhat tucked in and somewhat un-tucked is even harmful. Will I get light leaks? Or is there nothing to fear?
Sorry I can't get pictures right now because my computer is fudged. But hopefully if you have a OM10 maybe you can figure out what I'm talking about