Archived posting to the Leica Users Group, 2006/12/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have been the prime proponent for a filter coating over the sensor cover for the M8 to fix the IR issue.... Leica has told the market to use the 486 filter to fix the issue.....I have done some reading and present a write up from Adorama on the filter..... "Description This B+W Interference Filter has a completely colorless glass carrier coated with a number of extremely thin, partially reflecting layers with precisely computed thicknesses, similar to MC coating. The B+W Filter 486 does not block by means of absorption, but by interference of the unwanted UV- and IR radiation that is repeatedly reflected between these layers. It is especially recommended for CCD applications where digital image sensors have not been fitted with an IR protection filter. This filter is completely clear and it requires no increase in exposure. Its filter factor is 1. " I still have to digest this, but it may actually be not possible to have the absorptive filter coating on the cover plate without some form of other problems.,..... More to follow.. Frank Filippone red735i@earthlink.net