William Optics Gran Turismo 81 Triplet APO Telescope - Mount Package - A-F81GTII-P

William Optics   ——   SKU: WIL-A-F81GTIIBU-P
$3,217.00 CAD
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Product Info

William Optics Gran Turismo 81 Triplet
APO Telescope

  • 81 mm Aperture f/5.9 Imaging Refractor Telescope
  • FPL-53 glass for color free Apochromatic performance
  • Air-spaced Triplet APO Objective
  • Compatible with 0.8 Reducer/Flattener - Optional
  • Covers full frame imaging circle, with Flattener
  • 2.5" dual-speed Rack & Pinion Focuser
  • Colors: Available in three colors, Blue, Red, or Gold
  • Includes Mounting rings and Vixen style dovetail
  • Dovetail is dual type - flip over to get Arca Swiss plate
  • Weight: 3.74 kg (OTA with rings and dovetail attached)
  • Includes Guiding Rings
  • Includes Dust Cover with built-in Bahtinov Mask
  • Soft Carrying Bag for the Telescope
  • This package includes WO Equatorial 35 Mount and Tripod
  • This package includes a Guiding Scope
  • This package includes P-Flat6AIII Flattener

The William Optics Gran Turismo 81 Imaging APO Telescope is available in three colors. The following description refers to all the technical characteristics of the telescope, except their color. Choose the color you wish to purchse from the three variants listed in the box above. All three color variants have the same price!

The William Optics Gran Turismo 81 Imaging APO Telescope is a high quality Apochromatic Imaging optical telescope with an aperture of 81 mm and a focal length of 478 mm or an f-ratio of f/5.9, without the Reducer/Flattener, but the P-Flat6AIII Flattener is included in this Package product. This Package also includes the William Optics EQ35 Equatorial tracking mount and tripod, and also a Guiding Scope, and a Soft Carry Bag for the Telescope.

If you wish to take great astro-images with a high quality APO refractor, this William Optics Gran Turismo 81 Imaging APO telescope is a good way to obtain your goal. Its FPL-53 glass APO design provides images with extreme sharpness, clear details, great color, with APO grade color correction. If you add the optional 0.8X Flattener/Reducer lens, the focal length is shortened. Then the image circle will be full frame compatible, and perfect for imaging deep sky objects.

Introducing a first innovative feature in the industry: Now this Gran Turismo 81 Imaging APO Telescope from William Optics comes standard with a dust cover that has a built-in, clear Bahtinov Mask for perfect focusing every time. Simply remove the flat front cover plate, leaving the dust cover cuff in place on the scope. Point the telescope at a bright star, and focus carefully. When the bright central diffraction spike looks exactly centered between the other two spikes forming an "X", then your telescope is in exact focus for stars. Remove the dust cover cuff carefully from the objective end of the telescope, and you are ready to image.

What's In The Box:

  • The WO Gran Turismo 81 Imaging APO Telescope
  • Two Clamshell-style Telescope Mounting Rings w/ knurled clamp screws
  • Two Adjustable Guide Scope Rings
  • Vixen-style (or Arca-Swiss) Dovetail Plate for mounting the scope
  • APO (Apochromatic) design Objective w/ FPL-53 glass
  • 2.5" Dual-speed Rack & Pinion style Focuser
  • A WO Equatorial 35 Mount and Tripod
  • A Guiding Scope
  • A P-Flat6AIII Flattener
  • A Soft Carry Bag for the telescope


Product Number: A-F81GTII
Telescope Type: Triplet Apochromatic Refractor
Objective Aperture: 81 mm
Focal Length: 478 mm
Focal Ratio: f/5.9
Focuser: 2.5" Dual-speed R&P
Camera Format: Full Frame Image Circle
Tube Length: 390 mm (Fully Retracted), 470 mm (Extended)
Tube Weight: 3.74 kg With Rings and Dovetail
T-Mount: Interchangable T-Mount Style for Compatibility
T-Rings: None, T-Rings are available as optional accessories
Tracking Mount: EQ35 Mount and Tripod Included
Flattener: P-Flat6AIII Flattener Included

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