I am looking at a 3 stop ND filter. I already have a CPL. Should I just buy two CPL for a "vari ND". Anyone use this?
bagtagsell Senior Member  602 posts Likes: 1 Joined Apr 2007 Location: St. Louis, MO More info | Jun 16, 2010 16:29 | #1 I am looking at a 3 stop ND filter. I already have a CPL. Should I just buy two CPL for a "vari ND". Anyone use this? Mark Ryan Photography
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Jon Cream of the Crop  69,628 posts Likes: 226 Joined Jun 2004 Location: Bethesda, MD USA More info | Jun 16, 2010 18:29 | #2 Two CPLs won't give you a "Vari-ND". You'd need one linear and one CPL for that, and typically that will give you a deep blue cast to any images since most polarizing filters can't work evenly across the visible spectrum. Jon
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