Under no circumstances should any filter of the gelatin type be used, except for experimental purposes. In aerial ... Therefore the use of anything but an optical flat glass filter becomes unnecessary. ... with the filter exposed to the outside air temperatures, extreme care should be taken when changing a filter. ... Figures 3.5.16 and 17 show the transmission of the 700 my and 670 m/x infrared filters.
|Title||:||Manual of Color Aerial Photography|
|Author||:||American Society of Photogrammetry, John Talbot Smith|