This scope is ultimately designed for astronomers who want the best results in photographic/CCD imaging. The WO-Star71 imaging telescope provides pinpoint stars at the very edge of a 45mm imaging circle.
? 71mm f/4.9 Imaging Refractor Telescope.
? FPL-53 glass for color free apochromatic performance.
? 4 elements in 3 groups (2-1-1- configuration; new, unique, patented design - not a conventional objective/flattener/reducer design).
? Covers 48mm full frame imaging circle.
? 2.5" dual speed R&P focuser.
? Includes mounting rings and Vixen style dovetail.
? Weight = 4.19 lbs / 1.9 kg (OTA only); 4.85 lbs / 2.2 kg (OTA with rings and dovetail).
? Focuser drawtube travel = 2.5" / 35mm.
? Focuser drawtube terminates in a male M48 thread. Telescope comes with a wide M48-Canon EOS adapter ring. Similar rings are available from other supplier for other brands of cameras. Not a conventional 2" focuser tube with locking thumbscrews..
? Optional 1.25" 90-deg dielectric mirror diagonal sold separately for those wishing to use this as a visual. This diagonal comes with a custom adapter that connects directly to the M63 female thread on the telescope's focuser tube; you cannot use standard 1.25" diagonals. Telescope cannot reach focus with larger 2" diagonals.
WO Star 71 Photo Performance by Jerry Huang