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Aerial Cameras
Wild RC5a, RC8 and RC10 aerial cameras with Aviogon and Univer-
sal Aviogon, 15/23 X 25 cm, lens cones have been used. For
colour and infrared colour photography only Universal Aviogon
lens cones eith AV 2,2 sandwich filters have been used.
For special purposes, mainly photo-interpretation, four Hassel-
blad 500 EL cameras with a format of 70 x 70 mm have been used.
These cameras can be mounted in a package with the shutters
synchronized to take simultaneous photographs at different scales
or with different film/filter combinations.
The Swedish company AGA has developed an airborne thermal scan-
ner, known as the AGA Thermal Mapper, with an indium antimonide
detector which is sensitive to radiation in a wavelength band
from 2.0 pm to 5.6 pme RAK has, in co-operation with AGA, par-
ticipated in a programme to test this equipment. The equipment
has also been used by RAK to carry out special investigations
for various organizations.
Photographic Material
Black ond White Photography
Kodak Double-X has become the most commonly used film for con-
ventional survey photography. Kodak Plus-X has been used when
the haze conditions would have given too low contrast using
Double-X. Agfa Gevaert Aviphot Pan 56 PE was tested in 1971 and
Seems to be a good complement to the films earlier used. All the
films used are on estar base.