Sky-Watcher Quattro Coma Corrector

In fast Newtonian telescopes, coma is an optical aberration that makes stars at the edge of your field of view look like little comets or teardrops. This accessory corrects that distortion, ensuring your stars remain sharp and pinpoint-accurate across the entire frame.

While it is specifically optimized for the f/4 Quattro Newtonian telescopes, it is designed to work with other fast Newtonian reflectors. However, performance may vary depending on your specific focal ratio and optical setup.

The 55mm backfocus is the precise distance required between the back of the corrector and your camera's sensor to achieve a perfectly corrected image. You will need to account for the distance of your camera body and any spacers or T-rings you are using to hit this exact measurement.

Yes, it is compatible with optional DSLR adapters. You will simply need the correct T-ring for your specific camera mount to attach it to the corrector.

No, this is a coma corrector, not a focal reducer or Barlow lens. It is designed to fix optical aberrations without changing the native focal length or focal ratio of your telescope.