Quote Originally Posted by BradS View Post
Some (all?) auto focus cameras need a circular polarizer but for manual focus, it doesn't matter. Either one will work fine for you Canon F1.
Not necessarily true. My T-90 requires a circular polarizer. It has to do with how the metering light is picked off. It is true to say that all AF cameras and some MF cameras require a circular polarizer if you want metering and AF to work correctly.

A circular polarizer will work with anything. Unless you know you will never get a body that needs it I would get a circular polarizer.

Otherwise the F-1 is simple enough that a linear will work fine.