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Optical Tube Assemblies 

You want to buy the best telescope for the most affordable prices, visit our store now and shop from the the top international brands that we have selected for your.
[WIL-A-F81GTIVTG] Gran Turismo 81 IV (Space Grey) Sale
3 UNITS LEFT
Optical Tube Assemblies
Gran Turismo 81 IV (Space Grey)
$ 1,570.56

Gran Turismo 81 , f/5.9 OTA. FPL53 three-element APO, 2.5” R&P Focuser in Space Gray

  • GT81 APO
  • 2" & 1.25" Adapter Included
  • Bahtinov Mask Included
  • STM Multi-Coated Lenses
  • f/5.9
  • This is the Space Grey version

Optical Performance

The Gran Turismo 81 is a Three Element Designed APO refractor. Using FPL-53 glass this telescope provides excellent aberration correction.

Details and Features

2.5" R&P Focuser

The 2.5" R&P Focuser is smooth, stable, and reliable! No image shifting!

New Designed Rotator

William Optics designed camera angle rotator. Smooth and stable.

CNC Handle Bar

Made by CNC with anodizing. Strong and nice look!

Bahtinov Mask

World first built in clear Bahtinov mask!

Add to Cart
[WIL-A-F81GTIVGD] William Optics Gran Turismo 81 IV (Gold) 2 UNITS LEFT
Optical Tube Assemblies
William Optics Gran Turismo 81 IV (Gold)
$ 1,570.56

Gran Turismo 81 , f/5.9 OTA. FPL53 three-element APO, 2.5” R&P Focuser in Gold

  • GT81 APO
  • 2" & 1.25" Adapter Included
  • Bahtinov Mask Included
  • STM Multi-Coated Lenses
  • f/5.9
  • This is the Gold version

Optical Performance

The Gran Turismo 81 is a Three Element Designed APO refractor. Using FPL-53 glass this telescope provides excellent aberration correction.

Details and Features

2.5" R&P Focuser

The 2.5" R&P Focuser is smooth, stable, and reliable! No image shifting!

New Designed Rotator

William Optics designed camera angle rotator. Smooth and stable.

CNC Handle Bar

Made by CNC with anodizing. Strong and nice look!

Bahtinov Mask

World first built in clear Bahtinov mask!

Add to Cart
[WIL-A-F81GTIVRD] William Optics Gran-Turismo 81 IV (Red) image_2026-04-20_173716646.webp Sale
2 UNITS LEFT
Optical Tube Assemblies
William Optics Gran-Turismo 81 IV (Red)
$ 1,538.44
Discover precision astrophotography with the compact and powerful Gran Turismo 81 IV f/5.9 APO Triplet Refractor. Equipped with a high-quality FPL-53 triplet lens for exceptional clarity and color correction, this telescope is perfect for capturing detailed celestial images. Its robust 2.5” R&P focuser ensures precise adjustments without image shift, while the elegant design features a retractable dew shield and a durable white powder-coated finish with gold trim. Ideal for travel, the GT81 comes with a soft carry case and all essential adapters, making it a top choice for astronomers on the go.
Add to Cart
[WIL-A-Z61IIGD] William Optics Zenithstar 61II APO (Gold) WIL-A-Z61IIGD 1 UNITS LEFT
Optical Tube Assemblies
William Optics Zenithstar 61II APO (Gold)
$ 607.03

William Optics ZenithStar 61II APO Refractor - Gold

A versatile, ultra-portable telescope designed for breathtaking astrophotography and high-end wildlife observation.

  • Superior Optics: 61mm (2.4") aperture with a fast f/5.9 focal ratio for crisp, detailed images.
  • Full-Frame Ready: Large 41mm image circle, perfect for 36x24 full-frame DSLR and mirrorless sensors.
  • Precision Focusing: 2-inch R&P dual-speed (10:1) micro focuser with 75mm travel and built-in Bahtinov Mask cover.
  • Ultra-Portable: Weighs only 3.2 lbs with a compact retractable length of 230mm—ideal for travel.
  • Ready to Go: Includes a rotatable L-mounting bracket and a premium soft carry case.
Note: This is the elegant Gold Edition.
Add to Cart
[WIL-A-Z61IITG] William Optics Zenithstar 61II APO (Gray) WIL-A-Z61IITG 1 UNITS LEFT
Optical Tube Assemblies
William Optics Zenithstar 61II APO (Gray)
$ 607.03

William Optics ZenithStar 61II APO Refractor - Grey

A versatile, ultra-portable telescope designed for breathtaking astrophotography and high-end wildlife observation.

  • Superior Optics: 61mm (2.4") aperture with a fast f/5.9 focal ratio for crisp, detailed images.
  • Full-Frame Ready: Large 41mm image circle, perfect for 36x24 full-frame DSLR and mirrorless sensors.
  • Precision Focusing: 2-inch R&P dual-speed (10:1) micro focuser with 75mm travel and built-in Bahtinov Mask cover.
  • Ultra-Portable: Weighs only 3.2 lbs with a compact retractable length of 230mm—ideal for travel.
  • Ready to Go: Includes a rotatable L-mounting bracket and a premium soft carry case.
Note: This is the sleek Space Grey Edition.
Add to Cart
Showing 5 of 5 results