RedCat 71mm WIFD f/4.9
RedCat 71mm WIFD f/4.9
RedCat 71mm WIFD f/4.9
RedCat 71mm WIFD f/4.9
RedCat 71mm WIFD f/4.9

William Optics

RedCat 71mm WIFD f/4.9

Regular price
$ 1,798.00
Sale price
$ 1,798.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

The WIFD RedCat 71 is just like the old standard, but replaces the helical focuser with William Optics' Internal Focuser Design.


Key Features

  • 71mm f/4.9 Astrograph.
  • FPL-53 glass for colour free apochromatic performance.
  • 4 elements in 3 groups (2-1-1- configuration; new, unique, patented design - not a conventional objective/flattener/reducer design).
  • Covers 45mm full frame imaging circle.
  • Precise helical focusing and camera rotation; includes a 48mm make thread that accepts a wide T-ring.
  • Includes mounting rings, 21cm long Red Vixen style dovetail and Cat saddle.
  • Weight =  6.2lbs / 2.8kg (OTA only);  8.2lbs /  3.7kg (OTA with ring, dovetail and saddle).
  • WIFD (William Optics Internal Focuser Design) - compatible with EAF!

The WO Cat71 is a 71-mm f/4.9 refractor using a Petzval design with a doublet front element incorporating FPL-53 glass, plus a single central element and a single rear lens. By this design, our WO Cat71 provides a flat image plane without any additional flattener and the image circle is over 45mm. WO Cat71 is designed primarily for imaging, making it an astrograph.

This scope provides an excellent colour correction and pinpoint stars at the very edge of a 45mm image circle.

If you want to take images with the best quality, this beautiful and powerful telescope is what you want.


Four-Element Patented Design 2+1+1


Super Bright Bahtinov mask


Full frame/ APS-C compatible 

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.