Archived posting to the Leica Users Group, 1996/06/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 10:44 PM 6/12/96 +0300, you wrote: >described mechanically, but I got one question >concerning the optical quality. Is it OK, if the filtering >effect is not "uniform"? If I look the sky through it, >there is not filtering effect at the center of the filter - >except in the very center. The size of the "white You have to realize the way a polarizer works is not going to give you a uniform effect. The reason is, the amount of polarization differs depending on how far off axis from the light source you are looking. The maximum effect will happen at 90 degrees from the light source. Of if the sun is in the east, the greatest effect will be pointing north and south. And the closer you get to the light source (or 180 degrees from that) the less polarization occurs. And just to make it clear, when the sun is directly overhead, the greatest effect will be anywhere on the horizon. Does that help? ========================== Eric Welch Grants Pass Daily Courier