Soligor 100mm f2 Optical Diagram

[xaprb]

I recently got a copy of this lens and I don't see much about it online. Anyone know the optical diagram? I can't find an official reference. I have sketched out my best guess. I am not sure about the curvature of the middle surfaces of the two cemented groups; I'm mostly trying to figure out by looking at reflections, but I could be wildly wrong based on the refraction of the surfaces I'm looking through to try to deduce.


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[blotafton]

[quote="xaprb"]I recently got a copy of this lens and I don't see much about it online. Anyone know the optical diagram? I can't find an official reference. I have sketched out my best guess. I am not sure about the curvature of the middle surfaces of the two cemented groups; I'm mostly trying to figure out by looking at reflections, but I could be wildly wrong based on the refraction of the surfaces I'm looking through to try to deduce.


I don't think I have seen a diagram like this, and I've looked at many. It mostly reminds me of the Heliar Classic 75mm f/1.8 but it's 6 lenses in 3 groups.

[stevemark]

Is this diagram based on dismantling the lens, or simply on looking through the (not dismantled) lens?

S

[xaprb]

Dismantling. But I didn’t unglue the two cemented doublets!

I am not a very good sketch artist, so even my crude sketch misrepresents the thickness and curvature of some of the elements.

[stevemark]

Ah OK - pretty reliable information then! Thanks a lot for sharing!

S

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[xaprb]

That's my lens! Thank you! Now I have to check and verify that someone didn't reverse the last doublet... it'd clearly been disassembled before I owned it, and when I looked at that group, I thought how easy it would be to put it in backwards.

[Blazer0ne]

...

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