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A high-precision eyepiece for a wide range of astronomical measurements. Includes four
red-illuminated, laser-etched scales for measuring double star angular separations, position
angles, planetary diameters, and lunar crater diameters, and for long-exposure photo-guiding.
Modifited Achromatic 3-element coated optics, diopter adjustment, rubber eyecup; variable LED
illumination control; batteries
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