William Optics Gran Turismo 81 Triplet APO Telescope - A-F81GTIV

Out of stock
Regular price $2,117.00 CAD

Product details


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 3 colors, Titanium Silver, 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 Soft Carry Bag
  • Includes Dust Cover with built-in Bahtinov Mask

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 optional Reducer/Flattener.

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
  • 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
  • Machined Carrying Handle
  • High Quality Soft Carry Bag


Product Number: A-F81GTIV
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
Bag: Yes, Includes Soft Carry Bag
T-Rings: None, T-Rings are available as optional accessories