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