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

Our #: ZZT-ZZWO-STAR71
Mfg #: A-WO71
Our Price: $1,068.00
Free shipping for this item in the US
More Info

Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

Out of Stock
Availability: Item has been discontinued by the manufacturer

Product Details

William Optics is used to churning out excellent telescopes regularly, but they are especially stoked about their latest product. The WO-Star71 imaging telescope provides pinpoint stars at the very edge of a 45mm imaging circle. Take a look at a new production sample photo of the Heart Nebula (IC 1805) / h Persei (NGC 869) / Chi Persei (NGC 884) area in Perseus taken with this telescope!

Key Features

  • 71mm f/4.9 Imaging Refractor Telescope
  • FPL-53 ED glass element 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
  • Back focus = 66.4mm from 48mm Canon thread and 91.4mm from drawtube end
  • Optional deluxe soft-padded carry case available separately

Additional Information

  • Focuser drawtube terminates in a male M48x0.75 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 (see "Related Products" tab above). 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.
  • The first production run of this telescope had an M65 female thread which was later replaced with a more common M63 thread in subsequent production runs.

Specification for ED Lenses

All William Optics refractor objectives are double tested and inspected by WO at their factory. These telescopes are free of coma and astigmatism. Since all individual lens surfaces are machine coated, sometimes you may notice visual imperfections which will not compromise the optical performance of the telescope. THe dimensions of scratches and points shall not exceed the following values:

  • Scratches - Maximum Width: 0.025 mm
  • Scratches - Maximum Length: 1/4 of total lens diameter
  • Scratches - Maximum Quantity: Three
  • Dots or Spot Points - Maximum Diameter: 0.4 mm
  • Dots or Spot Points - Maximum Quantity: Three
  • Accumulation of Defects - Limited Area: 0.8mm^2
  • Accumulation of Defects - Total Area: 5.8mm^2
You May Also Be Interested In