ASA's 16" F/3.8 Astrograph Newtonian is an excellent Optical Tube Assembly (OTA) to build a custom imaging system around. This astrograph OTA has an aperture of 16", a focal length of 1520mm, a natural focal ratio of f/3.8 (3.6 W/ Included Wynne Corrector), a tube length of 1310mm, a tube diameter of 470mm, a Newtonian output port compatible with 3" focusers, and weighs in at a mighty 70.55lbs. This 16" F/3.6 model-16N Astrograph OTA by ASA will accept the 3" AAF3 Focuser W/ Absolute Encoders.
This ASA astrograph tube assembly is manufactured of sandwiched carbon fiber. Carbon fiber technology adds to the astrograph's visual appeal, while making it approx. 60% lighter. Thanks to the thermal stability of carbon fiber, your focus remains stable over a long period of time. The tube assembly's stability means the optics remain collimated longer. Speaking of collimation, the primary mirror of the ASA 16N Astrograph includes a center triangle reference mark for ease of collimation. The internal surface of each tube assembly is also treated with black velvet, to reduce scattered light.
For example, by installing the 3" Wynne Corrector lens (standard with N-models) you achieve a focal ratio of f/3.6. With the 2" (or 3") Reducer, a focal ratio of f/2.75 results. The field corrector lenses will handle the largest CCD arrays currently popular, because all of the ASA correctors provide sufficient backfocus (flange focal distance). (Note to customer: Corrector lenses must be purchased separately. The A2-ASA16NO3FM product does not include a corrector!)
This ASA Newtonian Astrograph is a special order item and requires a 20% deposit when you place your order, and the balance will be required before the telescope leaves Austria. This deposit is fully refundable as long as you cancel your order before the telescope is imported. Please email OPT or give one of our Telescope experts a call at 1-800-483-6287.
Note to customer: The image shows an 8" OTA; the 16" 16N Astrograph will be quite a bit larger!
- Additional Information
SKU A2-ASA16NO3 Manufacturer ASA Telescope Series ASA Carbon Fiber Optical Design Astrograph Mount Type None - Optical Tube Only Warranty 2 Year Warranty Telescope Aperture 16" Telescope Focal Length 1520mm Telescope Focal Ratio f/3.8 Tube Color or Finish Carbon Fiber Optical Tube Outer Diameter 470mm Length of Optical Tube 1310mm Optical Tube Weight 70.55lbs Dew Shield Included? No, Not Necessary Finder Included None Focuser Size 3" Focuser Style Crayford Manual or Electronic Focusing? Manual
- Included Items
- ASA 16" model 16N Astrograph OTA
- Tube Rings
- 3" Focuser w/ 2" Adapter
- OK Control Software
- Controller & Cable
- Fan Cable
- Laser Collimator
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