I came across a Soligor 250 f4.5 for rather cheap, and it even had a T4 to Pentax M42 adapter on it. Based on the
positive report of luisalegria, I took a chance.
Turns out it also had a nice chunk of fungus on one of the inner elements.
According to an old diagram I found, this lens only has 4 elements in 4 groups.
I'm wondering if anyone know hows to take this thing apart to try to remove the fungus. Here's what I see:
Those two screws on zoom part of the barrel are the only screws I see other than those 3 little ones near the mount. Do I just start unscrewing the screws and carefully document to see what I find? I've looked online, and it appears that some lenses disassemble by using a calipers and unscrewing a plate from the front lens, but it doesn't look like that can be done here.
And should I start pulling out screws, any idea what to expect?
For a cheap and old lens, I'll agree w/ luisalegria that it takes quite nice pictures, and the fungus spot is not really noticeable in most shots for now. (It does a better job at 250mm than my DAL 55-300 at 250mm.) Is is better to just leave it be until the fungus becomes a problem? (In the meantime, I'll give it sun exposure to at least try to halt the fungus growth.)
Any help would be appreciated! Mark