All rights reserved. Never noticed any anomalies with this unit. Since then, Agena has become one of the leading online retailers of telescopes and astronomical accessories worldwide. In most cases, the easiest option is to choose the focal reducer made specifically for your telescope. It's usually specified from the base of the mounting threads on the reducer's housing, and this is the most practical way of providing this specification. You cannot, for example, use a 0.63x focal reducer intended for a standard Celestron or Meade SCT and use it on a Celestron Edge HD or a Meade ACF. Focal reducers for refractors with focal ratio of f/7 to f/9, roughly, have a design reduction factor of about 0.75x to 0.8x and produce a flat field by correcting for the curvature of the objective lens. The equations in the Appendix show how this all works. Perhaps not exactly- there will be some uncertainty because of manufacturing tolerances and so forth, but it will be close. This would tell us exactly how well aberrations are corrected. This focal reducer from Celestron reduces the effective focal length by 0.63X Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes f/11 telescopes, such as the C14 will perform at f/7 The Celestron f/6.3 Reducer has four fully-multicoated elements Reduce your exposure times by a factor of 3! No rainchecks will be issued for items out of stock at OPTcorp.com to match a competitor's price. It was also a little brighter in the center of the field with subtle darkening in the outer 20% or so. Figure 6 shows a 1.25" focal reducer from GSO configured with a ZWO ASI224MC camera. Antares f/6.3 SCT Focal Reducer - Rother Valley Optics Ltd Can you tell me about the use of reducers in Maksutov-Cassegrain telescopes? You can adjust your cookie settings, otherwise we'll assume you're okay to continue. This article explains the basics of how focal reducers work with an astronomy telescope. Fumbling around in the dark, fine threads might be a problem.

Obituaries Colorado 2022, How Is Heritage Day Celebrated In Churches, Turpin High School Football Record, Daniel Gutierrez Obituary, Articles A