canon ef-s 55-250mm f 4.0-5.6
What type of polarizing filter for Canon 18-55mm and 50-250mm? I have a Canon 450D with two lenses: EF-S 18-55mm IS 1/3.5-5.6 and EF-S 55-250mm IS.What f/4.0-5.6 type of polarizing filter should I buy for them? Circular linear? I prefer the linear case is cheaper. The first lens has a diameter 58 mm, not sure [...]