Open Box RedCat 71 WIFDOpen Box display unit. Like new with warranty. Small marks on the dovetail bar consistent with use on displaying the unit on mounts in the store showroom. Clean optics, and a great deal. RedCat 71 WIFD The William Optics WIFD 71 mm APO Astrograph is a premier tool for astrophotographers. The RedCat WIFD 71 provides color free apochromatic performance. With 4 elements in 3 groups (2 1 1 configuration), the 71 mm RedCat Petzval refractor is designed