ASA 2" Reducer Corrector for ASA N-Series Astrographs

ASA 2" Reducer Corrector for ASA N-Series Astrographs
Item # A2-2KORRR
1 Questions(s)

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  • The Astrosystems Austria (ASA) 2" Reducer Corrector has a reduction factor of 0.73 and can be used on N-Series Astrographs or other Newtonian style telescopes.
  • The ASA 2" Reducer Corrector has a corrected field of 22mm and 65mm of back-focus.
  • The 2" Reducer Corrector is included with all f/2.75 N-Series Astrographs.


ASA 2" Reducer Corrector

To correct the field of view on their N-Series Astrographs, ASA uses correctors designed by Philipp Keller. All correctors have sufficient backfocus to connect to all popular camera systems.

Depending on the corrector, systems can be used at f/3.6 or shortened to f/2.75. Alternatively, N-Series Astrographs can be extended to f/6.8. The photographer can decide which focal length to use, depending on the object they are imaging, the seeing conditions, and other considerations such as wind.

For example, an ASA Astrograph N 8"/f3.6 with a focal length of 730 mm can also be used at 558mm (f/2.75) or as a 1380mm, f/6.8 system. All ASA correctors are available separately and can be used with other Newtonian telescopes.

ASA 2" Reducer Corrector Specifications...

  • Corrected Field: 22mm
  • Backfocus: ca. 65 mm
ASA - AstroSysteme Austria Product Number: RC2
Additional Information

Additional Information

Manufacturer ASA
Barrel Size 2"
Warranty Not Supplied By Manufacturer
Included Items

Included Items

  • ASA 2" Reducer Corrector
Questions & Answers

Product Questions

I've seen this used with GSO/TPO newts. However looking at ASA's datasheet it doesn't give any info on the back focus for a 8"/200mm scope. Is there formula for figuring the correct back focus respective size of the scope?
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