Reccomend me a filter to protect 70-200mm L F4

[primalcarl]

I'd like a clear filter to protect my 70-200mm L F4 lense.

How much should I expect to pay and what kind of model should I look for?

Thanks

[Uhland]

I'd get a center pinch cap and put the lens hood on.
Good protection and guaranteed to not effect the image quality

[GSansoucie]

Ditto to Uhland, don't waste your money on another piece of glass between your subject and your sensor. . .

[Jon]

A good multi-coated filter won't affect your photos; a B+W MRC, Hoya S-HMC (or better) or Heliopan SH-PMC are high quality. That's what, a 67 mm filter size on the 70-200 f/4? Somewhere in the $80-100 range, IIRC.