Astronomy Specialist

GRAN TURISMO 81 F/5.9 APO TRIPLET

$2,095.00

Color
Gold
Red
Quantity
- +

 

The William Optics Gran Turismo 81 is a three element apochromatic refractor with a focal ratio of f/5.9 and a focal length of 478mm. Utilizing FPL-53 synthetic fluorite glass, this telescope provides excellent aberration correction.

The 2.5" 10:1 rack & pinion focuser is smooth, stable and reliable, providing no slippage over long imaging sessions. The newly designed rotator allows you to precisely adjust the angle of your camera.

The CNC-machined and anodized handle bar with Vixen-style saddle is perfect for attaching a guide scope or other accessories. The Gran Turismo 81 also includes William Optics' innovative clear Bahtinov mask integrated into the lens cap.

William Optics uses high quality steel lens cells for their Gran Turismo and FLT triplet refractors. This is perfect for temperature compensation and will prevent pinched optics in cold weather conditions.

For best imaging results, it is recommended to pair the Gran Turismo 81 with its matching Flat6AIII 0.8x field flattener.


 

Optical design

Apochromatic triplet

Objective diameter

81 mm

Focal length

478 mm

Focal ratio

f/5.9

Image circle

44.4 mm (with Flat6AIII field flattener)

Compatible flattener

William Optics Flat6AIII

Mount attachment

210 mm Vixen-style/Arca-Swiss dovetail bar

Focuser

Rack & pinion dual speed (10:1) 2.5" diameter

Camera connection

M63 x 1, 2"

Backfocus

62.1 mm (with flattener/reducer)

Tube weight

3.9 kg (including accessories)

Tube length

390 mm (fully retracted), 460 mm (fully extended)

Tube diameter

TBA

Dew shield diameter

TBA

SKU

WO-A-F81GTIVGD (Gold), WO-A-F81GTIVRD (Red)

 


 

  • Gran Turismo 81
  • Lens cap with Bahtinov mask
  • Vixen-style saddle handle bar
  • 210 mm Vixen-style dovetail bar
  • Soft carry case

Customer Reviews

No reviews yet
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
×
Welcome Newcomer