Manufacturing precision optics for fast,
ground-based inventories of forest
biomass & volume.

GLOBALLY APPLICABLE WEDGE PRISMS

Our amber tinted prisms (1-10 BAFs) heighten contrast in low-light conditions in all forest types.
Our clear prism size range of 1-24 BAF enables “big BAF” height measure sweeps
at 4x diameter measure sweeps of 1-6 m2/ha.
The big BAF method is the world’s most time-efficient method to measure forest
biomass and volume without losses in accuracy or precision1.

MODERN Wedge PRISM LENSES

Aluminum tubes shaped for eye sockets, clear labels, protective caps, and cases with lanyards allow anyone to conduct prism sweeps from plot center without push or pull positioning errors, BAF size errors, glass chipping, or equipment losses. Prism lenses are also compatible with all smartphone or tablet camera lenses via included clips. Off-set tree stem images can be viewed via digital grids to more easily view “in” or “out” status. Furthermore, off-set images can be digitally photographed for auditors, supervisors, and others.

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1Marshall DD, Iles K, and Bell JF. 2004. Using a large-angle gauge to select trees for measurement in variable plot sampling. Can J For Res 34:840–845.

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