Leitz wetzlar polarizing filters information. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Leitz wetzlar polarizing filters informationfor reducing reflections and increasing the contrast in photography. NEUTRAL GREY, therefore, equally well suited for bla and white or colour pictures. O’ NON-FOGGING, therefore, no lack of image brillian no loss of sharpness. é HIGH TRANSMISSION, therefore, an exposure factor of no more than 2 is required. ERNST LElTZ - WETZLAR