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AG Optical Systems 10" Newtonian Astrograph OTA

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Product Description

AGO Newtonian astrographs are a photo junkie's idea of Nirvana.  By combining large aperture, fast focal ratio, corrected optics in a lightweight, stiff, and thermally stable carbon fiber tube AGO has created an instrument with a singular purpose:  to devour photons and precisely focus them on your CCD camera's chip.

AGO Newtonian astrographs offer the best value in the high-end Newtonian astrograph market.  On a feature by feature comparison, there is no comparison: AG Optical Systems is light years ahead!

  • Best in class FLI Atlas focuser is standard

  • High quality primary and secondary optics (Ultra Low Expansion mirrors optional)

  • Thick wall carbon fiber sandwich honeycomb core tube for focus stability

  • Wynne corrector with generous 3.1" of back focus, focus interface machined directly into corrector housing for a rigid, tilt-free, repeatable connection

  • Focuser reinforcement rings to carry heavy camera loads

  • Multipoint primary mirror flotation cell with heavy duty locking screws for collimation stability

  • 100% Made in the USA with outstanding customer support

Model Specifications

Model N10a N12.5a N16a
Aperture 10" 12.5" 16"
Focal ratio 3.8 3.8 3.8
Focal length 38" 47.5" 60.8"
Optics Supremax 33 full face primary mirror, center marked with Catseye Hotspot
Secondary size (ma) 4" 4.5" 5.75"
Focuser FLI Atlas
digital focuser
Corrector 3" Wynne with 80 mm backfocus, several camera adapters available
Coatings High reflectivity aluminum
Tube Rings hinged, 6061 black anodized, predrilled to fit Paramount ME Versaplate
Tube outer diameter 14" 16" 20"
Tube length 34" 42" 58"
Tube weight ~ 28 lbs ~44 lbs ~ 88 lbs
  • Supremax 33 low expansion mirrors

  • Enhanced aluminum coatings

  • CNC-machined multi-point flotation cell for primary mirror

  • Multiple edge supports at mirror's center of gravity

  • Primary mirror baffle

Wynne Corrector

Off-axis abberations are corrected through the use of an AGO-designed, 100% made-in-the-USA 3.2" Wynne corrector providing pinpoint stars over a 50mm diameter field of view.  The Wynne corrector provides generous 78.5 mm of backfocus accomodating many CCD camera/filter wheel/off axis guider combinations.

FLI Atlas with Wynne Corrector and adapters

  • High quality broadband antireflection coating on each lens surface

  • Multiple Schott and Ohara glass types used to achieve excellent correction from 400nm to 700nm across 50 mm image circle

  • FLI Atlas and Wynne corrector included as standard

  • Wynne corrector housing has Atlas interface machined directly into the corrector housing to ensure a tilt-free, repeatable, and extremely rigid connection between the focuser and the Wynne corrector.


AGO has selected the best in class FLI Atlas digital focuser as standard equipment for our Newtonian astrograph line.  This focuser is capable of carrying heavy camera loads and is extremely smooth and robust.  Its digital control system allows automatic focusing of stars and perfectly complements an AGO Newtonian astrograph.

Optical Tube Assembly

Stiffness and thermal stability are primary requirements of the design behind the tube assemblies used for AGO's Newtonian astrographs.  A thick wall carbon fiber sandwich core tube is the backbone of each tube assembly creating a very stiff yet lightweight, thermally stable structure to support the optical and mechanical components of the telescope.

AGO 12.5" Newtonian Astrograph with standard focuser reinforcement rings

  • CNC machined 6061 components, black anodized for a dark, durable finish

  • All fasteners stainless steel

  • Focuser base reinforcement rings are standard on AGO Newtonian astrographs to provide critical support to heavy imaging cameras.

  • High quality prepreg carbon fiber materials cured at elevated temperature using vacuum bag techniques

  • Reinforced interface at tube-to-focuser base junction

  • Three 12vdc, speed adjustable cooling fans

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