The Tri-Tech Forensics Authorized ABFO No. 2 Photomacrographic Scale is designed by the American Board of Forensic Odontology and is used through the country when photographing bite marks on a victim's body. The three crosshair circles are useful in helping to compensate for distortion resulting from oblique camera angles. The graduations are all metric, except for the width of the legs, which are 1" wide. The 1 cm division lines are traced and extended across the photographic print to grid an image. Measurements within the image are then made relative to these inscribed 1 cm grid lines to compensate for any distortion resulting from non-parallelism between the film and the object planes.
L-shaped laminated plastic size1mm ThicknessDimensions (H x L)4 x 4" / 101.6 x 101.6mm