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Forensic Investigation and Laboratory

Forensic investigation requires an uncommonly wide variety of visual survey techniques. Large areas of the scene must be systematically scanned for fibers, soils, and other evidence, while minute residues of fluids and powders must be examined in detail when and where they are found.

Contrary to the image popularized by films and TV, real investigators do not walk around with giant coffee-saucer size magnifiers - such lenses, by the laws of physics, deliver insignificant magnification.

Instead, a low to moderate power magnifier, such as the ZeissD8-AR, is best for scanning large areas, while a versatile two-lens folding loupe, the Zeiss D12+24 allows tiny objects to be identified and recorded before removal to the lab. For fingerprint comparison, common stand magnifiers have magnifications between 3.5X and 4.5X; therefore a hand magnifier of equivalent power, such as the Zeiss D12-AR, positioned close to the eye, is the ideal choice for preliminary field reading of prints. For fiber work in the lab, the high-power Zeiss D20-AR facilitates thorough searching of fabric surfaces.






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