Originally Posted By: andym
Which brings me to another question, is it worth spending 50-odd quid on a Hoya or Sigma polarising filter from Jessops, or are the cheaper ones from far east on ebay worth a punt?

I can't find any data on a Sigma 15-200mm lens but I'm guessing it's 62mm diameter. £20.99 incl. shipping for a Hoya one from One Stop digital in HK.