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William Optics Gran Turismo 102 Twenty Years Anniversary Edition (Gold)
William Optics Gran Turismo 102 Twenty Years Anniversary Edition (Gold)

William Optics Gran Turismo 102 Twenty Years Anniversary Edition (Gold)

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Your Price: CAD3,230.90
Retail Price:CAD3,239.00

Your Savings:CAD8.10(0%)

Special Order, Usually ships in 2-3 Weeks
Part Number:A-F102GTSG-VP20A

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The William Optics GT 102 APO is a beautiful telescope, from the pristine white finish on the CNC to the elegant gold trim. Everyone knows, however, that outward beauty is fleeting, and so its a good thing the GT102 has way more going for it than good looks!

The William Optics GT 102 has a focal ratio of f/6.9 and features a triplet air-spaced objective made from extra-low dispersion glass that is fully multi-coated with super high transmission coatings for beautifully sharp, high contrast, true color images. The optics sit in an adjustable high precision lens cell.

The aluminum optical tube is CNC machined and powder-coated white. The captured dew shield retracts fully when not in use, but does a great job of deflecting contrast-robbing light coming in from nearby porch lights, etc.

You’ll enjoy the 2" rack & pinion focuser and its precise 10:1 dual focusing capabilities. The focuser can be rotated a full 360º so that you can position your camera in just the right location. An 1.25” adapter is included, allowing you to use both 2” and 1.25” eyepieces for visual work. A pair of mounting rings, a Vixen-style dovetail, and a soft carry case are also included in this package, not to mention the William Optics FLAT6A field flattener and reducer, which works wonderfully well with APS-sized sensors. You can read more about the Flattener below the specs for the GT 102.


  • Designed with APS chip-size DSLR cameras in mind.
  • The WO GT102 Flattener has a FMC doublet design.
  • Produced entirely with the best Ohara optical glasses.
  • Reducing factor 0.8X.
  • William Optics polished anodized finish.
  • All internal surfaces threaded and blackened to prevent reflections.
  • Rotating T-ring thread for any 35mm camera.
  • Canon EOS T-ring is included.
  • Lens-to-chip suggested distance: 70.5±1mm for F/6 APO
  • Weight : 165g or 5.8 ounces


Telescope Optical Design Refractor
Refractor Design Apochromat (APO)
Number of Refractor Elements 3
Telescope Aperture 4"
Telescope Focal Ratio f/6.9
Telescope Focal Length (mm) 703
Optical Coatings Fully Multi-Coated
Secondary Mirror Central Obstruction N/A
Limiting Stellar Magnitude 13.9
Diagonal Included? No, but Recommended
Telescope Eyepiece(s) Included? No, Sold Separately
Finder Included? No, Sold Separately
Includes Telescope Case? Yes
Focuser Style Rack & Pinion
Focuser Size 2"
Focuser Speed Dual Speed
Telescope Mount Type No Mount - OTA Only
Telescope OTA Diameter (in.) 4.13
Telescope OTA Length (in.) 27
Telescope OTA Weight (lb.) 11.1
Bonus Items in Package Includes Flattener/Reducer with adapter for GT102 and Canon EOS T Ring
Telescope Warranty Period 2 years

In the Box

Soft carry bag included!

The new GT102 three-element super APO Anniversary offer superb quality for imaging and visual use at an affordable price.

Package includes:

-GT 102 three element design with center FPL-53 and other ED element glass (air spaced)

-Mounting rings

-Retractable dew shield with lock screw

-All-new 3" Victory Edition Diamond Crayford design (Zero image shift)

-2 speed knobs 1:10

-Aperture: 102mm F6.9

-Free vixen style dovetail plate

-Weight: 11 lb

-Length: 27"


Attention to detail

• Highly precise CNC machined lens cell.

• Triple testing each lens by Zygo test to ensure the best optical quality.

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