Archived posting to the Leica Users Group, 2003/09/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]One of the things we used to use in the days before video was a very strong neutral density filter to view lighting contrast. The one we used was about 1" in diameter and had a little wand on it to hold it up to your eye. It was made by Kodak. Mike D Sonny Carter wrote: > Hello Oliver, > > That makes sense, especially for still work. I do believe that the > person who suggested that director's viewers are Blue is correct, > having seen one. That may stem from the majority of motion picture > lighting being daylight, (a very blue part of the spectrum) arcs and > dichoric filters over tungsten for fill. I'm no photo-physist either. > either, just relying on my dimming memory. > > Of course filters just remove colors or reduce their intensity. They > don't turn blue or brown into gray. A iewing filter helps you see what > tones a scene might look like in Black and white. But it doesn't > adjust for film type. That has to be done in the head. > > Sonny > > > Sunday, September 14, 2003, 7:34:46 AM, you wrote: > > OB> Mark, Calumet still sells the Zone VI Wratten #90 viewing filters, mounted > OB> in discs with cutouts for 35mm, 4x5 or 6x6 aspect ratios. The discs - about > OB> 2 or 3 inches in diameter - are meant to be hung from the neck. > OB> Sonny suggested that the color of the monochromatic viewing filter may not > OB> matter. I remember from Ansel's class that the reason why the Wratten #90 is > OB> used as a viewing filter is that it lets the eye see the tonalities of a > OB> scene in a way that approximates the response of panchromatic film. This > OB> helps, for example, to avoid merging tonalities. Since my recollection of > OB> optical physics is exceedingly dim (pun intended), I do not want to be > OB> judged too harshly for saying "the Wratten #90 filter removes chroma", the > OB> phrase that sticks in my mind. > OB> Oliver Bryk > > > OB> -- > OB> To unsubscribe, see > OB> http://mejac.palo-alto.ca.us/leica-users/unsub.html > > > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html