Is this lens worth buying an M42 adapter for? (Pentax brand of course)
I'm not even sure if that's the actual maker or a relabel brand.
I inherited this lens with a box of half junk along with my Super Program among other things years ago and wrote it off as some cheap off brand thing. But now that I am looking for a reasonably fast prime longer than 50mm for astrophotography among other things (already have other suggestions for that from another thread) so I pulled it back out and tried to look it up.
Apparently my parents used to have a Spotmatic that was replaced with the Super Program but the lens hung around for some reason along with an adaptall 2 28mm F2.5 with both M42 and KM adapters.
Best I could find was a few pics from one in this thread
The 2013 Day Prime Challenge - Dyxum - Page 57 (cemetery shots half way down) which doesn't look half bad considering its adapted to a Sony A99 full frame, he noted that he botched the focus on the wide open shot which is too bad since I wanted to see the quality of that the most but the others seem awfully good for some cheap ancient off brand.
It seems to be in near like new condition and has an odd A/M switch ring to go from auto to manual aperture so it must be fairly old. The outer element is smaller than I would expect filter size wise for an F2.5 and its pretty small and light overall. Not sure if the slight yellow tint is old lens yellow or if its just an odd coating reflection assuming this thing is even coated.
On another note our miscellaneous 3rd party lens review section is a disaster, someone needs to go through and standardize the lens titles so they can be sorted by either focal length or brand because right now they are a random mishmash and the list has gotten too long for that. The "find focal lengths starting with" and the search function also both seem to be broken.