Archived posting to the Leica Users Group, 1997/03/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]ghuczek@eagle.wbm.ca (George Huczek) wrote >The F-1 focusing screen has a beam splitter, which redirects (but >doesn't polarize) some of the light towards the meter. When a >linear polarizing filter is used on the camera, is causes metering >problems. A circular polarizer illimimates this problem. Linear works very simply as well. It is a unfortunate misconception that linear polarizer doesn't work with beam splitter meters. When you have a lin. pol. on you turn it around to find the maximum of light available according to the meter. Set your exposure accordingly. Then turn the polarizer to the angle that corresponds to the desired visual effect but do not change the aperture or time anymore. At that aforementioned max the polarizer and the beam splitter kill the same wave directions. Hence the filter just appears as a 1.5 or so stop grey filter to the meter. Simple physics and understanding it saves you from getting a $80 circular Heliopan... ;-) Regards, Kari Eloranta