Astroprices

Gran Turismo 81

William Optics

From $1,538.00

3 stores

In stock

The Gran Turismo 81 IV f/5.9 APO Triplet Refractor is a compact and powerful telescope equipped with a high-quality FPL-53 triplet lens for exceptional clarity and color correction, perfect for capturing detailed celestial images. At 478mm focal length (f/5.9), the GT81 is well suited for mid to large nebulae, and its 45mm image circle illuminates full-frame 35mm sensors evenly, delivering sharp, consistent images across the entire field with virtually no vignetting. 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.

Specifications

Highest magnification 162
Optics type Refractor
Optical design Triplet Refractor
Aperture 81 mm
Focal length 478 mm
Focal ratio f/5.9
Coating STM (Super-High Transmission) Multi-Coating
Glass Type FPL-53 Extra-Low Dispersion
Focuser Type 2.5 inch Rack & Pinion with 1:10 Dual Speed
Image Circle 45 mm
Weight 10 lb
Retracted Length 390 mm

Related products

William Optics GT-81 IV

GT-81 IV

William Optics

~$1,650.16

William Optics Ultra-Cat 56

Ultra-Cat 56

William Optics

~$1,142.98

William Optics SpaceCat 51 III

SpaceCat 51 III

William Optics

~$1,096.94

William Optics RedCat 61

RedCat 61

William Optics

~$1,155.41