You are on european store, if you’re shopping from Extra-UE Country please visit our Worldwide store

Product was successfully added to your shopping cart.
  • Correttore 2" per RC GSO Correttore 2" per RC GSO

Free shipping in most EU countries

for order at least €500

TS-Optics reducer/corrector 0,73x for Newton

Product code: TS2Korrr

Be the first to review this product

Quick Overview

TS-Optics reducer/corrector 0,73x for Newton corrects coma corrector and reduce focal length turning your Newtonian telescope into a high-speed astrograph. Developed by Ackermann, a well-known US optics designer, it can be used with all Newtonian telescopes from f/3.5 to f/8 and, in order to make it useful, you need to have just a 50.8mm focuser and 85mm backfocus from 50.8mm focuser adapter. Usable field up to 30 mm (APS-C size) diagonal sensor, fully corrected 22 mm.

Availability: Order

22% tax incl
if you pay by bank transfer €751.75


Basically, the corrector/reducer can be used with all Newtonians from f/3.5 to f/8. It has an M48 thread at the camera side. A further adaption is not problematically and can be planned to one millimetre. The adapter shifts back the focal plane by 15-16 millimetres. This value results from the reduction factor of the reducer. You need approximately 85 mm from the 2" receptacle of the focuser to the focus to make the reducer operational. Because of the increased speed, you have to pay attention on accurate clamping. Even minimal tilting results directly into unsharp stars at the edge.

The design of the corrector allows for a usable field of 22 mm diameter with 100% illumination. With a little trick at focusing, this field can be extended to approx. 30 mm. Do not use a star in the middle of the field, but use a medium bright one in the outer third of the field.

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

  1. Be the first to review this product

Write Your Own Review

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars