Orion - 6" f/4 Newtonian Astrograph Reflector Telescope

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The Orion 6" f/4 Newtonian Astrograph Reflector optical tube assembly is great for those beginner astrophotographers and comes with great tools to capture stunning images of the cosmos! The telescope can obtain remarkable high-resolution images of deep-sky objects with relatively short exposure time! In addition, the optical tube is lightweight at 12.7 pounds meaning a huge isn't required.


SKU: ORI-10269
Manufactured by:
Orion
 

Product Description

Orion 6" f/4 Newtonian Astrograph Reflector Telescope

The Orion 6" f/4 Newtonian Astrograph Reflector optical tube assembly is great for those beginner astrophotographers and comes with great tools to capture stunning images of the cosmos! The telescope can obtain remarkable high-resolution images of deep-sky objects with relatively short exposure time! In addition, the optical tube is lightweight at 12.7 pounds meaning a huge isn't required.

The steel Newtonian Reflector optical tube's 6" aperture parabolic primary mirror measures a focal length of 610mm, making this fast f/4 telescope excellent for wide-field photography of deep sky. Due to the primary mirror be composed of B270 glass which is thermally stable, the scope can adjust to ambient temperature faster than most standard reflectors. The oversized 63mm minor axis secondary mirror provides fabulous field illumination for DSLR and CCD cameras. Both primary and secondary mirrors boast enhanced reflectivity (94%) aluminum coatings to optimize contrast with a protective silicon dioxide (quartz) overcoat.

The telescope also features a 2" dual-speed (10:1) linear-bearing Crayford focuser that lies 7" back from the front of the 22.5" optical tube. By blocking stray off-axis light, it helps maximize contrast for high-resolution performance. The design will also hold heavy payloads without slippage. The Orion-exclusive steel reinforcing plate underneath the focuser eliminates flexure to provide consistent results every night. A 2" compression ring collar and 1.25" compression adapter keep inserted cameras and accessories secure without scratching.

In addition to photographic use, the Orion 6" f/4 Newtonian Astrograph also excels at visual use. The included 2" diameter extension tube adds 1.38" (35mm) of length to the focuser for visual use. High contrasts views are a key highlight feature with the 6" aperture and fast focal ratio for high-contrasts views of the night sky!

Also included are aluminum tube rings with flat bosses on the top and bottom featuring M6 threaded sockets for easy attachments of the included Vixen-style mounting bar and additional imaging accessories. An 8x50 straight crosshair finder scope with dovetail bracket and snap-on dust cap are also included.

An optional coma corrector is suggested to eliminate coma for imaging performance.

Specifications

Name Orion - 6" f/4 Newtonian Astrograph Reflector Telescope
Manufacturer Orion
Model ORI-10269
Finderscope 8x50
Focal Length 610mm
Focal Ratio f/4.1
Focuser 2" dual-speed linear bearing Crayford
Highest Useful Magnification 177x
Included Accessories Pair of hinged tube rings, 2 inch extension tube, 8 x 50 finder, dust cover
Limiting Stellar Magnitude 13.5
Lowest Useful Magnification 21x
Material Steel
Mount None - OTA only
Optical Design Reflector
Optical tube diameter 150mm
Optical Tube Length 22.5 in
Optical Tube Weight 12.7 lbs
Resolving Power 0.77arc*sec
Secondary Mirror Obstruction 63mm
Secondary Mirror Obstruction by Area 18%
Secondary Mirror Obstruction by Diameter 42%
Warranty One year

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