Hi, would appreciate comments on the following :
Is there any major difference ( in quality ) between the different makes of CPs eg Hoya, etc ? If yes, which one(s) is good and how much does it cost roughly ( for say 77mm dia. ) It would be a pity to spoil the optical quality of a good 80-200 f2.8 lens with poor CP ? ( I do realise of course that the CP will probably reduce the light by approx 2 stops, but that's not what I am concerned about ).
Thank you and look forward to the comments from the many "sifu"s out there.