I bought a telephoto lens recently.

https://tokinalens.com/product/sz_900mmpro_reflex_f11_mf_cf/

I found that optical quality appeared to be good...at least for indoor tests.

Then I took it outdoors, where temperatures are cool in the winter months. Image quality suffered...horribly.

See image captions.

In cold temperatures the lens appeared to be giving images with lots of astigmatism.

(to be continued)

#photography
#TokinaLens
#LensRepair
#BadDesign
#DesignFlaw
#astigmatism
#MirrorSupport

Guys! Defying all odds, I've managed to reassemble this lens after taking it apart and cleaning it! The aperture ring appears to be working normally. #Konica57f14 #LensRepair

Guess who's playing with lighter fluid and sharp, pointy tools? If all goes well, I'll have a Konica 57mm f/1.4 lens that has clean lens elements and non-sticky aperture blades. If not, I'll have a bag of broken parts. #Konica #LensRepair