Skip to content
⚠️ Our store is currently closed for the Holiday Season until 28 Jan ⚠️ Orders received during our closure will be posted upon our return from 30th January. 🎁 Free Shipping on all orders with discount code: HOLIDAYS at checkout 🎄 Thank you & Happy Holidays! 🎅
⚠️ Our store is currently closed for the Holiday Season until 28 Jan ⚠️ Orders received during our closure will be posted upon our return from 30th January. 🎁 Free Shipping on all orders with discount code: HOLIDAYS at checkout 🎄 Thank you & Happy Holidays! 🎅

William Optics RedCat 51mm II F/4.9 Petzval APO Refractor Imaging Telescope

Original price $1,449.00 - Original price $1,509.00
Original price $1,449.00
$1,449.00
$1,449.00 - $1,509.00
Current price $1,449.00

This is the latest version II with  an improved helical focuser and updated tension adjustment.

Designed to be the best, affordable, small, lightweight and fast Apochromatic refactor for astrophotography. The unique optical design includes the highest quality glass for the best possible color correction and flat large image circle suitable for full frame sensors. The result is a 51 mm objective lens, in a sleek Petzval design, delivering outstanding images with unbeaten portability.
Australian Authorised dealer
Read Sky & Telescope's review of the RedCat 51!
You can add a T mount to connect your DSLR camera to the RedCat here.
Mount a ZWO EAF Electronic focuser & an ASIAIR PRO to the RedCat 51 using the Black Cat Mount - here.  

The William Optics RedCat 51 APO II is a 51mm f/4.9 Petzval refractor that features synthetic fluoride (FPL53 and FPL51) glass elements for a full frame, flat field image.

Provides high resolution images when used for astrophotography or wildlife photography.

It's fast f/4.9 focal ratio and compact size makes it ideal for convenient wide field astrophotography or piggybacking.

Incorporates a smooth helical focuser, a field rotator graduated by degree, a slot for 48mm filters and a reversible dovetail for either Vixen style or Arca-Swiss mounting.

Carrying case is included. 

William Optics RedCat 51 - 1William Optics RedCat 51 - 2William Optics RedCat 51 - 3William Optics RedCat 51 - 4William Optics RedCat 51 - 5

 

William Optics RedCat 51 Box contentWilliam Optics RedCat 51 backfocusWilliam Optics RedCat 51 optical test