WO-Star71 71mm f/4.9 Apo Imaging Refractor

Product Code: A-WO71
Out Of Stock
Price: US$1,068

Available Options


Soft carry bag included !!


·        71mm f/4.9 Imaging Refractor Telescope

·        FPL-53 glass for color free apochromatic performance

·        5 elements in 3 groups (3-1-1- configuration; see photo 2 above. New, unique, patented design - not a conventional objective/flattener/reducer design)

·        Covers 45mm full frame imaging circle

·        2.5" dual speed R&P focuser

·        Includes mounting rings and Vixen style dovetail

Weight = 4.5 lbs / 2.05 kg (OTA only); 5.3 lbs / 2.4 kg (OTA with rings and dovetail)

·        Focuser drawtube travel = 1.38" / 35mm

Additional Information

·   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 scope. This diagonal comes with a custom adapter that connects directly to the   M65(M63) female thread on the telescope's focuser tube; you cannot use standard 1.25" diagonals. Telescope cannot reach focus with larger 2" diagonals.

·   Optional soft carry case available separately .

Specification for ED Lenses

All WO refractors objective are double tested and inspected before shipping to our customer, these telescopes are free of coma and astigmatism.
Since all individual lens surfaces are machine coated sometime it could have visual imperfections which do not affect the objective optical performance.


Dimensions of scratches and points shall not exceed the following values:

Surface finish class Scratches Points Accumulation of defects Width,not more, mm Total length, not more, mm, Diameter no more,mm, Quantity, no more Diameter. 

Scratches Width, not more, mm 0.025mm
Total length, not more 1/4 of total lens diameter. 
Quantity no more 3
Dots or spot points No more, mm 0.4mm
Quantity, no more 3
Accumulation of defects Limited area, mm 0.8mm^2
Total area of scratches and points, no more, square mm 5.8mm^2

Astronomy Magazine Reviews:

Star71 Test report(Astronomy Technology Today)


William Optics WO-Star71 71mm f/4.9 Apo Imaging Refractor

Write a review

Your Name:

Your Review: Note: HTML is not translated!

Rating: Bad            Good

Enter the code in the box below:

Related Products