I consider both "haze" and "UV" filters as correcting and have used both. UV especially come to mind when shooting at higher altitudes.
Jack ----- Original Message ----- From: Godfrey DiGiorgi <godd...@me.com> To: Pentax-Discuss Mail List <pdml@pdml.net> Cc: Sent: Saturday, November 2, 2013 6:09 AM Subject: Re: Filters? Tiffen filters are often ok glass-wise, but often have cheap, aluminum mounts with sharply cut threads that can damage plastic and soft metal lens mounting threads if not handled carefully. They are also prone to getting jammed and being difficult to remove. Haze vs UV vs UV Haze for protecting a lens on a digital camera makes no difference whatever. All three are designed to filter out UV light scatter, which digital sensors are not particularly sensitive to. The biggest things to watch out for with filters is added flare and focusing issues. Some are improperly made and have some curvature or a wedge shape to their surfaces. Those can degrade image sharpness and cause AF issues. Even multicoated filters will add some flare potential and should always be used with a good lens hood. I saw flare problems and stopped using protection filters as a general rule in the early 1980s. But I do still use one from time to time depending on circumstances. Most of the time I just leave my lens unprotected except for a lens hood. I await the Mongol Horde of filter extremists and their flaming swords ... Perhaps I'll offer them tea. Godfrey > On Nov 2, 2013, at 4:00 AM, Eric Weir <eew...@bellsouth.net> wrote: > > Midway in my walk back in September I replaced the lens cap on the A 28/2.8 > with a uv filter. Recently I thought I ordered 49 and 67 mm uv filters > [Tiffen] for use as lens protectors on two other lenses. When the order > arrived I had two 67 mm flyers, one uv, one uv haze. > > My first thought was to return the haze, but reading up a little I thought > maybe I’d keep it. In a discussion of uv vs. uv haze on photo.net, however, I > encountered a diversity of opinions about filter vs. no filter and uv vs. > haze, and strongly negative opinions about Tiffen. > > I’d be interested in this group’s thoughts. -- 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.
