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<blockquote data-quote="aroy" data-source="post: 329294" data-attributes="member: 16090">I use filters mostly against dust. Delhi is a dusty place, so are out door locations. Dust on the filter (or front element) creates a lot of reflection (loss of contrast) and at times uneven transmission. At the end of a day out doors, the filter does accumulate a lot of dust. To clean it I blow on it, and if that does not clear the dust, I simply unscrew it and wash it with neutral soap and then dry it. Try that with a lense and you will most probably ruin it. I some how get a lot of fingerprints on my filters, a thing I would not like to be on my lense front element. Dust especially in arid regions is very abrasive, so wiping it off the lense will scratch the front element ultimately. And then there is spray at sea coast and water falls.The current generation of filters from Hoya and B+W have excellent glass and coating, unlike less expensive alternatives they do not degrade the image to any visible extent. I have shot with and without the UV filters, and could not find any difference in the images. So I always have a UV filter on.</blockquote>

[QUOTE="aroy, post: 329294, member: 16090"] I use filters mostly against dust. Delhi is a dusty place, so are out door locations. Dust on the filter (or front element) creates a lot of reflection (loss of contrast) and at times uneven transmission. At the end of a day out doors, the filter does accumulate a lot of dust. To clean it I blow on it, and if that does not clear the dust, I simply unscrew it and wash it with neutral soap and then dry it. Try that with a lense and you will most probably ruin it. I some how get a lot of fingerprints on my filters, a thing I would not like to be on my lense front element. Dust especially in arid regions is very abrasive, so wiping it off the lense will scratch the front element ultimately. And then there is spray at sea coast and water falls. The current generation of filters from Hoya and B+W have excellent glass and coating, unlike less expensive alternatives they do not degrade the image to any visible extent. I have shot with and without the UV filters, and could not find any difference in the images. So I always have a UV filter on. [/QUOTE]

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