Analog film photography and cameras

Crap. I really want a 3.5T now.

I had the choice between the grey 3.5T and a black 3.5F when I bought mine years ago.
The F won on:

• Lens quality. The Tessar used in the T is very, very good, but the Planar on the F beats it for edge-to-edge sharpness.
  
• Useability. The twin thumbwheels (for aperture & shutter speed) between the lenses on an F are an absolute joy to use, rather less fiddly than the controls on the T.
  
• Build quality. The T definitely was a lower-priced camera, you'll notice the moment you have an F and a T in front of you.
  
  

You could always attempt re-leathering an F in grey. That would be ace.