William Optics RedCat 71 348mm f/4.9 Petzval Apo astrograph
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.
The William Optics UltraCat 108 is a cutting-edge 108mm apochromatic refractor designed for astrophotographers who demand top-tier performance.
Featuring a 5-element advanced Petzval optical design and a fast f/4.8 focal ratio, it delivers breathtaking edge-to-edge clarity and vivid detail, making it perfect for capturing expansive celestial views. Its robust build, exceptional optics, and innovative features redefine the standard for astrophotography.
The Petzval optical design includes two Super ED glass lenses, one ED glass lens, and lanthanum lenses with advanced fully multi-coated coatings. Together, they deliver sharp, vibrant images with true-to-life colours and significantly reduced chromatic aberration.
This finder scope is so easy to set up and use that it relegates my Telrad finder scope into second place, what a lovely piece of kit, I'm really impressed. Thank you ThaiExcite for the excellent service.
Jim Mc.