A skylight or other warming filter is going to mess up all of the white balance presets and waste a tiny bit of light. These are color correction and they make no sense on a digital camera with adjustable white balance; they were designed to be used with daylight film under non-daylight (shade, etc.) lighting.
UV will do no harm relative to a clear filter, but no good either, since normal cameras are not sensitive to UV anyway. Personally I like the Marumi Super DHG clear protective filters (available from 2filter.com); they have a hydrophobic coating so you don't have to give up the water-shedding properties of the WR and DA* lenses if you want to use a filter, and the quality seems very nice for the money. I suspect that the coating is similar to the one tested here (which is a UV filter that I have not seen for sale in the US): http://www.lenstip.com/113.22-article-UV_filters_test_Marumi_77_mm_WPC_UV.html On Tue, May 6, 2014 at 11:29 AM, Godfrey DiGiorgi <godd...@me.com> wrote: > Skylight 1a, 1b etc are warming filters designed to reduce the influence of > open, blue sky light on skin tones with color slide film. UV or Haze filters > absorb ultraviolet light which contributes to haze from atmospheric scatter > when using older B&W films that are overly UV-blue sensitive. > > Neither is needed for digital capture. Neither influences digital sensors > much: white balance obviates the need for warming filters, and sensors are > not particularly sensitive to UV. > > For occasional protection use when working in dusty, muddy, or other > physically abusive circumstances, a clear, multicoated protective glass > filter is best. > > Godfrey > > >> On May 6, 2014, at 8:09 AM, David J Brooks <pentko...@gmail.com> wrote: >> >> One of the several reasons i wanted to get the Pentax 17-70 was its >> filter size. I have a number of 67mm filters and did not have to add >> to the lot. Although the Sigma is a much nicer lens IMO even with the >> reverse zoom, buit its a 72 mm filter. The salesman asked if i needed >> protection, and i told him no need i did not want any more children >> <ba dum> >> I said i'm sure i have a 72 filter some were, ( opps they are 77mm) >> and he said if not come back and he'll set me up, "JUST DON'T GET A >> SKYLIGHT" he said. I did not ask him why he thought that way, but then >> it started to think about it. >> >> Why not a skylight for protection, is the UV1 better suited,?? >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
