ptao

Thanks so much for the reply! It was very informative. When you say “whitish spots”, how do those differ from just dust? For the second, the “dust” seems more concentrated on one side of the lens, which is what worries me that it may actually be fungus.

I'm just getting into vintage lenses recently, so I'm still not confident on being able to identify issues. First off, I got a couple of manual focus Pentax lenses a few months back. At the time, I checked them and thought they looked fine, just a little dusty, which isn't surprising for their age. However, I've recently seen some posts online of lenses that I thought was also just full of dust, but people were saying it's fungus, haze, and/or separation. So, I redid the flashlight test on them, and I'm not so sure. 50/1.7 - I think this is just really dusty, but could it be separation? Hopefully not fungus? 50/1.4 - This one looks really similar to the 1.7, just whatever it is, there's way less of it. And finally, I just got a Meyer Optik Gorlitz Primoplan 58/1.9 yesterday. The first two pictures are haze right? It seems to be one or near the rear element. The last picture has me the most worried. That spot in the middle, is that fungus?