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.
