William Optics Gran Turismo 81 F5.8 Gold

William Optics GT81 IV triplet telescope with FPL-53 glass will amaze you visually and this telescope is also a great photographic one. The 2.5 inch rack and pinion focusing device with 1:10 delay for optimal focus, feels very smooth and responds immediately to every turn of the wheel. This telescope is excellent for observing the moon and planets, sun (with special filter) and ideal for astrophotography.

The focusing device offers the option of installing an optical viewfinder or Red dot finder. You can also set the pressure on the focusing tube, this determines how smoothly the focusing can be retracted or extended.

Specifications

Lens Diameter: 81mm

Focal length: 478mm

Speed: f5.9

Maximum meaningful magnification:202.5x

Minimum meaningful magnification:12.96x

Maximum resolution (arcsec / pixel):1.43

Limit Magnitude:12.43

Focuser type: Rack & Pinion

Focuser size: 2.5 inch

Focuser rotatable: Yes

Focuser fine adjustment: Yes 1 in 10

Type: Refractor

Type of optics: Apochromat triplet

Tube material: Aluminum

Tube weight (kg): 3.74

Tube length (mm): 390

Supplied viewfinder: No

Supplied eyepieces: No

Supplied diagonal: No

Tripod / mount included: No

In The Box

Gran Turismo 81 IV ota telescope

Color Gold

2.5 inch rack and pinion focusing device

Vixen and Swiss Arc dovetail

Telescope brackets

Handle with slot for Guide Scope mounting

Bahtinov mask in cap

Latest 2020 version version IV