take medium and close-up shots to show the extent of fire or chemical damage
and to help investigators recognize factors not easily recognizable in black
and white photographs.
For instance, excessive friction between moving
parts leaves a color pattern.
investigators the degree of wear, and the temperature caused by the
d. Types of Lenses and Flash Needed. You will find that a good 35mm
format camera with a long focal length lens, a wide angle lens, and a normal
focal length macro lens for close-up photography will be sufficient.
(1) The macro lens will allow you to make 1:1 images of small pieces
(2) The wide angle lens is useful in cramped spaces.
(3) An electronic flash is handy to fill in shadow areas to show
detail. For the close-up photography, an electronic ring flash mounted on
the macro lens provides excellent lighting for extreme close-ups.
e. Picture Details at the Accident Scene. Whenever possible include an
item in the picture that is of a known size for scale; i.e., vehicles in the
aerial view, people or vehicles in the general view, a 12-inch ruler in the
close-ups. You must also take detailed notes so you can accurately caption
each picture for the accident report.
Pertinent photographs of the following details are always required.
(1) General views of the scene along the wreckage pattern from the
point of impact to the point where the aircraft came to rest. Be sure to
include all marks on the ground (i.e., skid marks, burned areas, ruts, and
(2) Aerial view of the overall accident scene.
(3) Damage to all objects struck or damaged including government and
(4) All major parts of the aircraft including wheels and landing gear
assemblies, wing and tail structures, and control surfaces.
(5) Medium and close-up views of
switch settings, and control handles.