I've come into possession of a 1st version Canon F1 (the one that takes a mercury cell). The 50mm f1.4 on it has a non-working aperture stuck open at f/1.4 . Given that the cost of repairing the lens is probably greater than the value of the lens, I'm thinking of getting something else to put with it. I'm thinking of something with character that I can't get on one of my other systems - if I want a good quality 50mm, I have a Contax RTS III with the 50 1.4, which is a beautiful all-around lens. I'm thinking about for the F1 something like either the 55 1.2, the 58 1.2, the 85 soft-focus, or are there any other lenses I should consider that don't really have an analog on other systems (don't want/need super-telephoto stuff)? Also, I would love feedback on the 55 vs the 58 1.2 from anyone who has used both. I know that they both flare like crazy with a light source in frame, so that's not really a point of contention.