While I've had the F for a while, I didn't have any of these three lenses a week ago...
What we have here is a late Non-AI 24mm f2.8 (multicoated!) with a tiny bit of fungus in the rear element.
I was all ready to have a go cleaning it out, but it has a floating rear element and is considered a pain to work on.
I did not feel the right vibes to break it open...
I'll shoot it a bit and see how it does. I did zap the fungus with a UV light... maybe that will kill it dead...
Also, an earlier 135mm f2.8 Non-AI. This had some really ugly fungus that was on an inner surface of a rear element, but it cleaned out really well.
The front element is scuffed, probably from life in a dirty camera bag with no cap.
Finally, the Nikon 43-86 f3.5 zoom.
The first generation of this lens frequently makes lists of the worst lenses Nikon has ever made, and I've shot a little with one of those early ones. Yep. terrible. Late in the Non-Ai period they changed the optical formula to something that supposedly wasn't horrible. This is the slightly newer version of that, and it is Ai. We'll see. There's a birthday party tomorrow...I hope it's decent. It looks really good on the F with that hood...
A couple of things I'll note in general...
Old Nikon lenses are not put together the same way as old Pentax lenses. They are "poofier", with more empty space.
Many of them put all the optics in one big chunk of stuff with all the mechanism elsewhere... there's good and bad to that...
Focus feel is not anywhere near as good on these lenses as the Takumars of the same vintage.
The 135mm Nikkor f2.8 is nowhere near the build quality as my Takumar 135mm f2.5... we'll find about optics soon...
Bayonet mounts are awesome... but Nikon's metering implementation on the Nikkormats is so bad...
The F is so much better... if it had a real hot shoe, it would almost never annoy me...
-Eric