10 " Orion Newtonian astrograph excellent condition

Description: This scope is barely used, only took it out 3 times in an failed attempt to get into astrophotography.The 10"-class parabolic primary mirror boasts enhanced aluminum coatings on primary and secondary mirror that provide >92% reflectivity. Has a fast f/4 imaging rating. The 10" f/4 Newtonian Reflector Astrograph's 250mm (9.8") parabolic primary mirror is made of low-thermal-expansion BK7 glass, which is superior to standard soda-lime glass. The 1000mm focal length is ideal for framing a wide variety of celestial targets! The enhanced aluminum mirror finish has 92% to 95% reflectivity and is coated with a protective layer of SiO2 (quartz). The 88mm minor axis secondary mirror provides excellent full-field illumination with modern cameras, with minimal light drop-off at the edge of APS-C sized sensors. The rear cell features large collimation knobs and a built-in fan to speed cooling of the mirror (requires 8 AA batteries, not included). The mirror is center marked to aid in precise collimation, and a quick-collimation cap is included.he machined 3" dual-speed (10:1) Crayford focuser boasts a linear bearing design, which adds rigidity to the drawtube to support heavier imaging loads. A steel reinforcing plate directly under the focuser eliminates flexure between it and the tube. The focuser's 2" collar accepts 2" accessories and comes with a 1.25" eyepiece adapter, both with non-marring compression ring clamps. A 2" extension adapter (35mm length) is included for visual observation. Backfocus distance is 92.4mm from the 2" drawtube collar. I paid $899 for the unit and is pristine condition.Weight is 33 lbs as is. I have the original packaging.

Price: 749 USD

Location: Dade City, Florida

End Time: 2025-01-11T18:39:31.000Z

Shipping Cost: N/A USD