hi i just got a 'Hoya' 52mm polar filter. it screws onto my film based slr camera. i guess i have 2 questions, the first is about the rotating part of the polar filter. there is white indicator on the rotating part of the lense and im not sure what its for. my second question is basically about how to use the polar filter and what it does for my pictures. thanks for your replies. you can send me your answers at eilbron@hotmail.com
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