-- High precision guiding. Indirect guidings, e.g. to track comets, are also possible.
-- Measuring position angles of double stars
-- Fast determination of the effective focal length of a telescope
The reticle:The brainy reticle makes the eyepiece very versatile. The laser-engraved glass plate has guiding rings for astro photography, a 360° scale for measuring double star position angles and a linear scale for measuring many distances: Double star separations, lunar crater diameters and many more.
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