I recently purchased a used canon 70-300 mm IS lens and the seller gave me a UV and Circular Polarizer . The lens, while I will be sending for cleaning, and the UV filter seem to be in great condition but the polarizer when held to the light has a dark center with a lighter blueish ring around it. In one spot it seems as if the foil as pulled away from the edge and it appears like there are lighter flecks ( moisture or bubbles) in with the darker area of the filter . I can also see a small amount of daylight through the edge of the glass and metal. The filter is from B + W and while I know it is used, would like to know if this will affect the quality of the images I produce ( Canon XSi ) or if it is better to replace it. Thanks very much!
Those things are visible. You don't have to go hunting for them, if they were there, you would clearly see them. I'm not sure what else could be Wrong with it. Why not just go out and get a New one? The most they cause is around Thirty dollars. I'm sure the UV filter is fine, they last forever. If it's still functioning, it should be fine. For your well being, and to ease your mind, why not get a New Polarizer?
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