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William Optics Star71 Four Element f/4.9 Imaging Refractor w/2.5" Focuser - Limited Blue Edition - A-WO71-IIBU

SKU: WYO-A-WO71-IIBU

Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

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William Optics Star71 Imaging Refractor - Blue




Designed for astronomers looking for the ultimate astrophotography and CCD imaging instrument, the William Optics Star71 Imaging Refractor offers pinpoint stars at the extreme edge of a 45 mm imaging circle.



William Optics Star71 Imaging Refractor Highlights




  • 71 mm f/4.9 refractor optical tube
  • FPL-53 glass provides apochromatic performance free of color
  • Unique new patented construction with four elements in three groups with a 2-1-1 configuration, not an ordinary objective/flattener/reducer design
  • 45 mm full frame imaging circle is covered
  • Comes with a 2.5" dual-speed rack & pinion focuser, mounting rings, and a Dual Side dovetail
  • 2.5" (35 mm) focuser drawtube travel
  • Weight: OTA only: 4.19 lbs. (1.9 kg); OTA with rings and dovetail: 4.85 lbs. (2.2 kg)




Additional Information



Focuser drawtube ends in a male M48 thread. A wide M48 Canon EOS adapter ring is also included with the William Optics Star71. Similar rings are sold separately for other camera brands. This is not your ordinary 2" focuser tube with locking thumbscrews.



A 90º 1.25" dielectric mirror diagonal is available as an option (sold separately) for those who want to use the WO71 as a visual instrument. This diagonal includes a custom adapter that connects directly to the telescope focuser tube's M63 female thread; standard 1.25" diagonals are not compatible. The Star 71 refractor is not able to reach focus with larger 2" diagonals.

Description
Description

William Optics Star71 Imaging Refractor - Blue


Designed for astronomers looking for the ultimate astrophotography and CCD imaging instrument, the William Optics Star71 Imaging Refractor offers pinpoint stars at the extreme edge of a 45 mm imaging circle.

William Optics Star71 Imaging Refractor Highlights


  • 71 mm f/4.9 refractor optical tube
  • FPL-53 glass provides apochromatic performance free of color
  • Unique new patented construction with four elements in three groups with a 2-1-1 configuration, not an ordinary objective/flattener/reducer design
  • 45 mm full frame imaging circle is covered
  • Comes with a 2.5" dual-speed rack & pinion focuser, mounting rings, and a Dual Side dovetail
  • 2.5" (35 mm) focuser drawtube travel
  • Weight: OTA only: 4.19 lbs. (1.9 kg); OTA with rings and dovetail: 4.85 lbs. (2.2 kg)


Additional Information

Focuser drawtube ends in a male M48 thread. A wide M48 Canon EOS adapter ring is also included with the William Optics Star71. Similar rings are sold separately for other camera brands. This is not your ordinary 2" focuser tube with locking thumbscrews.

A 90º 1.25" dielectric mirror diagonal is available as an option (sold separately) for those who want to use the WO71 as a visual instrument. This diagonal includes a custom adapter that connects directly to the telescope focuser tube's M63 female thread; standard 1.25" diagonals are not compatible. The Star 71 refractor is not able to reach focus with larger 2" diagonals.

Specifications
Specifications
Model Number A-WO71-IIBU
Telescope Aperture 71mm (2.8")
Telescope Series William Optics WO-Star
Telescope Mount Type No Mount - OTA Only
Type of Electronics OTA Only - No Electronics
Optical Design Refractor
Number of Refractor Elements 4 (Quad)
Focal Length (mm) 350.2
Focal Ratio f/4.9
Image Circle 45 mm
Focuser Style Rack & Pinion
Focuser Size 2.5"
Focuser Speed Dual Speed
Telescope OTA Weight (lb.) 4.19
Warranty Two (2) Years
What's in the Box?
What's in the Box?
  • William Optics Star71 f/4.9 APO Imaging Refractor OTA - Blue Edition
  • 2.5" Dual-Speed Rack & Pinion Focuser
  • Mounting Rings
  • Guiding Rings
  • Dual Side Dovetail
  • Bahtinov Mask Cover
  • Metal Lens Cap
  • Soft Carry Bag
  • William Optics 71 mm f/4.9 Star Imaging Refractor - Blue Edition with Soft Case
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