William Optics Gran-Turismo 81 IV gold telescope (SKU: A-F81GTIVGD)

William Optics Gran-Turismo 81 IV telescope, gold (SKU: A-F81GTIVGD) is an apochromatic refractor with an 81 mm FPL-53 triplet objective. Its 478 mm focal length and 2.5" rack-and-pinion focuser allow it to be configured for observation or imaging with suitable accessories.

Key features

• apochromatic triplet with FPL-53 glass
• 2.5" rack-and-pinion focuser with 93 mm travel
• rotator M63 for convenient framing
• retractable dew shield and soft carrying case
• option to use a separate FLAT GT or FLAT 6AIII corrector

Included items

• optical tube Gran-Turismo 81 IV with focuser
• rotator M63
• 2" to 1.25" visual adapter
• mounting plate: Vixen / Arca-Swiss
• soft carrying case

Technical specifications

• manufacturer: William Optics
• manufacturer’s code: A-F81GTIVGD
• optical design: FPL-53 apochromatic triplet
• aperture: 81 mm
• focal length: 478 mm
• focal ratio: f/5.9
• image circle diameter specified by the manufacturer: 45 mm
• focuser: external 2.5" rack and pinion
• focuser travel: 93 mm
• compatible optional correctors: FLAT GT 1.0× and FLAT 6AIII 0.8×
• tube length: 390–460 mm
• weight of the OTA: 3.9 kg
• colour: gold

The model combines a portable 81 mm aperture with the option to add dedicated field correction to the imaging train.