I've had this Spotmatic F for a while now and I just "shot" through 36 frame b/w film. Brought it to get developed and they told me it was empty
even showed me the film, it really had nothing on it.
I'm (relatively) sure I did everything as usual. I once stumbled upon this thread:
https://www.pentaxforums.com/forums/pentax-film-slr-discussion/173380-i-screw...etty-hard.html, and ever since then I've made sure that the rewind knob winds
Anyway, here's what I did:
- Put in ASA100 b/w film, made sure asa selector was set to 100
- Advanced the film a few frames, made sure the rewind knob turned
- Shot 36 frames, after which the film refused to wind further (so I'm pretty sure it actually moved that whole time)
- Rewound it, which took a while
So I'm fairly certain that the film was advancing all the time. What could have gone wrong then? Why was there nothing on it? I asked the guy at the store if he could see whether it had been exposed at all or not, but he couldn't tell, they just ran it through the machine and it came out empty.