William Optics Star 71mm APO f/4.9 Refractor Telescope

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William Optics Star 71mm APO f/4.9 Refractor Telescope
$1,068.00
Item # WO-A-STAR71-II
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  • The Star 71mm f/4.9 Imaging refractor is according to William Yang of William Optics, " the best imaging scope we've ever built."
  • Like it's predecessor, the ZenithStar 71, the Star 71 is highly portable. Weighs only 6 pounds and is just over 1 foot long. This telescope can go anywhere including under an airplane seat! It's a great grab-and-go scope for the digital astrophotographer.
  • The optical design of the Star71 is a unique, patented design using five element FPL-53 fluorite glass in three groups to produce color free, pin-point images across a flat field. No flatteners or reducers are needed.
  • The lens cell, powder-coated white, gold-accented optical tube assembly, and dew shield are all CNC-machined.
  • A heavy- duty 2.5" rack and pinion 10:1 dual-speed focuser is super sturdy and will not slip when locked down, even with heavier cameras attached.
  • This package includes mounting rings, a 150mm Vixen style dovetail and a wide M48-Canon EOS adapter ring.
Description

Details

William Optics Star 71mm APO f/4.9 Refractor Telescope w/ Rings and Dovetail

"This is the best imaging scope we ever built" says William Optics founder and CEO, William Yang, in describing this new apochromatic refractor.

In addition to utilizing the highest quality FPL-53 fluorite glass, five elements are configured in three groups- a unique, patented 3-1-1 design- not the conventional objective/flattener/reducer design, that affords pinpoint stars from edge to edge covering a 45mm full frame imaging circle-- an astrophotographer's dream especially since this little jewel of a telescope includes a robust 2.5" dual speed rack and pinion focuser that even incorporates a temperature gauge. The drawtube terminates in male M48 thread to which a wide M48-Canon EOS adapter ring (included) can be attached.

This is not a conventional 2" focuser tube with locking thumbscrews.  For those wishing to use this very portable telescope as a visual instrument, an optional 1.25" 90 degree dielectric mirror diagonal is available separately.  The diagonal comes with a custom adapter that connects directly to the telescope.  (Please note:  standard 1.25" diagonals are not compatible with this scope which also will not reach focus with larger 2" diagonals.

The CNC-machined optical tube assembly, that weighs no more than six pounds, is finished in William Optics traditional pristine white with gold trim.

Additional Information

Additional Information

SKU WO-A-STAR71-II
Manufacturer William Optics
Telescope Series William Optics Star
Optical Design Refractor - Apochromatic
Mount Type None - Optical Tube Only
Warranty 1 Year Warranty
Telescope Aperture 71mm
Telescope Focal Length 350.2 mm
Telescope Focal Ratio f/4.9
Tube Color or Finish Gloss White
Dew Shield Included? Yes
Finder Included None
Focuser Size 2.5"
Focuser Style Rack & Pinion
Manual or Electronic Focusing? Manual
Focusing Speeds Two-Speed
Total Telescope Weight 6.2 pounds
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Included Items

Included Items

  • William Optics 71mm Star Refractor OTA
  • Mounting Rings
  • Vixen Style Dovetail
  • M48 Canon EOS Adapter Ring
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