Instruction/ maintenance manual of the product Astro-Tech AT90EDT Astronomy Technologies
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Thank you for choosing this Astro-Tech AT90EDT high-perf ormance apochromatic ED triplet re fractor . The images from i ts f ull y -collimatable 600mm f/6. 7 ED (Extr a-low Dispersion) air-spaced triplet optics are virtually color-free, even at high magnifications, thanks to its use of advanced Ohar a FPL -53 ED glass.
astr o - tech www.astronomytechnologies.com from Astr onom y T echnologies, PO Box 720013, Norman, OK 73070 © 2007 b y Astronom y T echnologies Specifications, features , and descriptions are eff ective 7/1/2007, but are subject to correction and/or modification without notice and/or obligation.
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