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ASA 1.175X Coma Corrector Quattro - 2"


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ASA 1.175X Coma Corrector Quattro - 2"

ASA 1.175X Coma Corrector Quattro - 2"

The ASA 2" Coma Corrector Quattro 1.175X could improve your imaging with your fast Newtonian (or Dob) astrograph, by eliminating that nasty coma problem that is spoiling your images!

This coma corrector fits into a standard 2" eyepiece barrel and it's optimized for CCD arrays which will fit within a circle of diameter 30mm or less. This includes (but is not limited to) the Kodak 8300 sensor, the Canon 20 D sensor, and the APS C Format. Vignetting at 30mm is less than 9%. This corrector can be used with a circular coverage of up to 40mm, however there will be some minor loss of performance, and some vignetting at the edges.

Without a good corrector, no astrograph will deliver optimum results. Optimized for bandwidth of 400nm to >700nm. Every lens used in the corrector is measured to verify its surface radius & thickness, before it is used to build a system. The ASA 2" Coma Corrector Quattro 1.175X corrects the coma (aberration) otherwise found in the image of a fast Newtonian or Dobsonian type astrograph. Results are a nearly-neutral magnification, actually 1.175X. Designed by ASA physicist Philipp Keller.

The pertinent dimensions for the ASA 2" Coma Corrector Quattro 1.175X are:

  • OD of barrel = 50.80mm
  • OD of rear flange = 56.80mm
  • OAL (includes threads) = 94mm
  • Thread size = M48 x 0.75 x 4mm length
  • FFD = 72.80mm
  • FFD (Flange focal distance) = Location of CCD plane behind flange
ASA Products are priced and shipped from Austria. Prices may vary without notice as the currency exchange rate for the EURO and USD fluctuates slightly. Shipping estimates and most current pricing will be provided for you at the time of order.

This item has product number: A2-2KORRC.