RedCat 71 Petzval APO

The William Optics RedCat 71 is a 71-mm f/4.9 refractor that features a 350mm focal length for fantastic widefield images of the night sky. The optical design is a Petzval design with a doublet front element incorporating FPL-53 glass, plus a single central element and a single rear lens, providing a flat image plane without requiring any additional flattener and the image circle is over 45mm. With a fast f/4.9 focal ratio and apochromatic optical design that virtually eliminates chromatic aberration, it achieves true-to-life color accuracy and razor-sharp images across the entire frame. Built with portability in mind, the RedCat 71 boasts a lightweight yet durable construction.