The ideal standard for Accurate Calibration of any eyepiece, reticle, filar instrument, electronic imaging or optical tube system. With a full array of fixed calibration lengths for quick set up and ease of use. Calibration magnification range: from 1x to 1000x power, with bar lengths 20mm to 0.10mm.
|| 1.0 in. x 3.0 in. (25.4mm x 76.2mm)
|| Positive Image
|| X-Axis Only