Guest peepshow Posted January 4, 2014 Share Posted January 4, 2014 Some narrow band filters are sold for visual use. So what is the difference, if any, between these and those used on a camera for AP work ? Thanks. Link to comment Share on other sites More sharing options...
Guest CodnorPaul Posted January 4, 2014 Share Posted January 4, 2014 I believe it is due to the higher quality glass required for AP that your eye simply does not need - and that's why the cost is so much more. The coatings are probably the same. Link to comment Share on other sites More sharing options...
Guest peepshow Posted January 4, 2014 Share Posted January 4, 2014 Thanks Paul for that. I should have realised that as I did try putting a cheap visual LP filter inside my 450d and the focus went to pot. Link to comment Share on other sites More sharing options...
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