Beercan - Diagnose problem #2

Started Nov 20, 2012 | Discussions thread
stan_pustylnik Veteran Member • Posts: 3,942
fungus?

sensibill wrote:

Pretty sure I didn't buy OP's lens. I got this from an older gentleman near where I live, who had it with a bunch of Minolta film stuff, a 7000 body and lenses.

take a look through your lens with opened diaphragm, make sure you don't see web-like mesh.

Once I bought Sigma 400mm f/5.6 APO prime lens that looked perfect outside. External optical elements were perfect too. However IQ was poor - showing very strong CA/PF artifacts.

Upon closer inspection internal lens element turned out to be affected by fungus.

here how it looked:

 stan_pustylnik's gear list:stan_pustylnik's gear list
Panasonic Lumix DMC-TS2 Sony Alpha DSLR-A850 Sony SLT-A55 Sony DT 18-55mm F3.5-5.6 SAM Sony 50mm F1.4 +11 more
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