Talk:Filter
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Regarding this edit, can you cite a source for the statement "most lenses already include UV coating"? Most? Glass itself absorbs shorter UV wavelengths (particularly higher-index types— see pgs. 4-5) but that is not a coating. --Vox 14:02, 17 March 2012 (PDT)
- Quite correctly you state that glass absorbs UV anyway, somewhere I have read mention of a layer (lens cement I think) formulated to absorb UV. In any case, the use of a UV filter is probably unnecessary.
What do you think about merging the neutral density filter article with this one? There doesn't seem to be a need for both --DesmondW 04:03, 22 April 2012 (PDT)
- Well, there are a number of pages that do (or might) link specifically to neutral density filter, so it seems preferable to keep it as a separate entity (linking to an anchor within an article can be "fragile," because any tiny change to that subhead text breaks it). The use of ND sheets as a light-adjusting element in exposure meters is also conceptually distinct from the photographic uses of other filters. --Vox 09:37, 22 April 2012 (PDT)
