Archived posting to the Leica Users Group, 2006/11/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have, in the past, been a victim of cameras that need a hot mirror filter (several DCS models) and in fact have a friend that makes the glass that goes in them. According to him it is an extremely thin coating that is designed to cut off certain wave lengths. His question to me was why not apply this coating to the glass covering the sensor? The Popular Photo article seems to imply that this (frequency) cut off is determined by the thickness of the filter (on the sensor) but my friend got a very strange look on his face when I mentioned this reply, especially since the Leica spokesman said that there was some coating on the sensor filter already.Remember not to equate the function of an anti-alies filter I have no basis for my assumption that to pull out the existing sensor filters and re coat them or apply a new sensor cover with a stronger IR cut off would cost too much. After all, the solution for Kodak sensors since the beginning has been to force buyers into hot mirror filters and this is one of the reasons the Kodak professional line of digital cameras has been such a roaring success story. -- Roy Feldman, photojournalism & editorial photography