I dunno, as much as I used to like the meterless F prism, I always figured people bought them so they could say their camera wasn't broken when the prism meters gave out.
Now I think I prefer the metered prism, despite the fact it is an asymmetric disaster, style-wise... it's just a product of its time and purpose... and it has that goofy meter coupling (that's still better than the disaster on the Nikkormat; what do you mean f5.6 to mount the lens? whose idea was this?)
Here's my F, with the shutter completely locked up and a newer 50mm Nikkor;
Next is the K1 for scale, wearing the extremely rare seven-element 50mm f1.4 Super-Takumar (nobody ever talks about it, but those 8-element ones are all over the forum...
);
Next to a Konica Pearl II 645 camera with its 75mm f4.5 Hexar.
I think the Konica is the smallest "real" medium format camera I've ever used (645 or bigger image).
The Konica is much smaller than my Mine Six, but that's really a 6x6 camera that cheats with a mask to do 645 (and does so admirably, if I may say), so not a great comparison.
But the Hexar might be a better lens than the Takumar on the Mine; it needs more investigation, that last roll from the Mine did pretty well.
I remember when I thought the Fs were HUGE...
I want to get this one fixed, but it's not high on the list as long as the Nikkormat is working...
Oh, and 250 frames? That's nothing...
This thing had a 16,000 ft film magazine (of 70mm, even...)
https://en.wikipedia.org/wiki/Corona_(satellite)
-Eric