The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

Sky Watcher Quattro Coma Corrector

SKU : SW-S20204

- Read
  • Free Shipping

  • More on the Way in 14 - 28 Days

Add to Wishlist

Got questions? Click for live chat

  • Made for use with f/4 Quattro Newtonians
  • Made with FPL51 and Schott glass for Extra Low Dispersion performance
  • The Quattro Coma Corrector requires 55 mm backfocus distance
  • Can be used with optional Sky-Watcher Canon and Nikon DSLR adapters

Product Details

  • This Sky-Watcher Quattro Coma Corrector is an optical accessory you will appreciate if you wish to do astroimaging with your f/4 Quattro imaging Newtonian scope. All classical Newtonian telescopes suffer from some coma problems because they have only a single parabolic mirror which does all of the ray focusing work! This is fundamental to the optical principles involved.

    Coma is an optical aberration which is usually observed in off-axis images formed by a telescope with a parabolic focusing system. Stars located off-axis or near the edges of the field seem to have a comet-like appearance instead of being round. Astronomers who do mainly visual observing can usually overlook some coma in their field. But when you do astroimaging with your equipment, coma will become a nuisance rather quickly as you expect your stellar images to appear round or pointed. For best results with your f/4 Quattro Imaging Newtonian scope, use the Sky-Watcher Quattro Coma Corrector to completely eliminate that annoying coma aberration.

    This Quattro coma corrector by Sky-Watcher is made with FPL51 and Schott glass and therefore features extra low dispersion imaging performance. The use of the Quattro Coma Corrector requires 55 mm of back focus and an image cone with an f/4 focal ratio because of its inherent design. Sky-Watcher makes Canon EOS and Nikon DSLR adapters for this purpose, and these can be obtained from OPT.

  • specifications

    Free ShippingYes
  • included items

    • Sky-Watcher Quattro Coma Corrector

Product Reviews

Customer Reviews
4.0 Based on 1 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    A OPT Telescopes Customer
    United States United States
    Very solid coma corrector

    This is one of the best coma correctors for imaging on the market. It's optimized for f/4 scopes, unlike the Baader MPCC Mk III, which is optimized for f/5. This means that the majority of imaging Newtonians at f/3.9 or f/4 will be a great match for this coma corrector. I consistently get sharp stars almost to the corners on an APS-C sensor with this coma corrector. It's got a 1.0x magnification, which is nice compared to some other coma correctors that slightly magnify the image. The only coma corrector that beats this one for imaging is the TeleVue Paracorr. Although it has a 1.15x magnification ratio, I get sharp stars even to the corners on an APS-C sensor. I actually enjoy the slight magnification gain — it turns my 800mm focal length telescope into a 920mm focal length equivalent. The Paracorr is considerably more expensive but worth it if you're using a Newtonian for serious imaging. Overall, though, this Sky-Watcher version is a great option too.

    OPT Telescopes Sky Watcher Quattro Coma Corrector Review