Originally posted by PWhite214 Pentax with Vivitar 70-210 lens. Also came with a Pentax bellows, 100mm bellows lens and 50mm SMC lens.
I had to fix the "mirror siezed' problem which took about 30 minutes.
I had both the original M42 pre-set and the later K-mount auto-diaphragm, which I believe had the identical optical formula. The M42 version was never as good as my Vivitar Series I 90mm macro, nor did the K-mount version have anything like the IQ of my Tokina 90mm f2.5 macro. HOWEVER, when either bellows lens is reverse mounted on a 200mm f4 SMCA (NOT the macro) the combination makes an outstanding 2X macro with a decent working distance. Reverse mounting on a lens with 100 to 200mm FL is where the bellows lens really delivers the goods.