Archived posting to the Leica Users Group, 2010/09/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]There are people who, for some reason, think that others have to justify why they prefer one thing or another, filter or no filter or even how they hold their camera. It's all personal preference, though. Phil Forrest On Sat, 4 Sep 2010 00:03:26 -0700 Richard Man <richard at imagecraft.com> wrote: > What I don't really understand is why does anyone need to justify > either decision to someone else and how someone's opinion or "100% of > PROs" opinions should have any weight on anyone else. I am just glad > that we still live in a (mostly) a free country :-) > > On Fri, Sep 3, 2010 at 11:52 PM, Henning Wulff > <henningw at archiphoto.com>wrote: > > > > > > > At present only polarizers are still sometimes laminated; most > > others are dyed in the mass. The latter would shatter. > > > > In earlier times coloured filters were laminated because the dyes > > could be controlled better in gel form than as dyes added to molten > > glass. They were abandoned when dyed in the mass became possible > > because the gels tended to fade relatively quickly, and they > > necessitated thicker filters which caused a lot of > > plano-parallelism problems. I once (in the 70's) checked about 50 > > filters; over 75% of the laminated gel types had surfaces that > > weren't perfectly parallel which would cause serious problems with > > some lenses. The gels also didn't really provide any structural > > strength; not like the vinyl in laminated safety glass. > > > > As far as the UV filter argument goes, the filter ring ding vs. > > lens rim ding I can understand, but my lens shades do an even > > better job and they shade besides. Also, if you shatter the filter > > after whacking the lens against something, it does not necessarily > > follow that the front element would have been damaged if the filter > > had not been there. Maybe yes, maybe no. > > > > As you might guess from the above, I use filters when there is a > > good reason, but leave it off otherwise. I did some tests once > > which showed that under some circumstances the images gets slightly > > degraded when a filter is used. Not often, but still... > > > > If you use a filter, make sure the coatings are good. It doesn't > > have to be the most expensive one. > > > > -- > > > > * Henning J. Wulff > > /|\ Wulff Photography & Design > > /###\ mailto:henningw at archiphoto.com > > |[ ]| http://www.archiphoto.com > > > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > >