William Optics Gran Turismo 71 Twenty Years Anniversary Edition

 

William Optics GT71 Gold Triplet Refractor – 20th Anniversary Edition

From its pristine CNC-machined aluminum tube painted powder white, to its stylish gold accents, the beautiful new William Optics GT71 APO Refractor is an aesthetically pleasing telescope. However, the GT71’s external good looks are just the beginning.

This refractor telescope features a triple element objective utilizing high quality FPL-53 extra-low dispersion glass to lessen any undesirable spectral lines to an incredible degree.

Description

William Optics GT71 Gold Triplet Refractor – 20th Anniversary Edition

From its pristine CNC-machined aluminum tube painted powder white, to its stylish gold accents, the beautiful new William Optics GT71 APO Refractor is an aesthetically pleasing telescope. However, the GT71’s external good looks are just the beginning. This refractor telescope features a triple element objective utilizing high quality FPL-53 extra-low dispersion glass to lessen any undesirable spectral lines to an incredible degree.

Optically Unequaled

  • Air-spaced objective has three elements and uses FPL-53 glass in a modifiable ultra high precision CNC machined lens cell
  • Incredible sharpness and color correction
  • With an f/5.9 focal ratio, the William Optics GT71 refractor is optimized for astrophotography
  • Each lens is fully multi-coated and contains a unique super-high transmission coating (STM) on each surface

2″ V-Power Focuser

  • 1:10 dual-speed ultra-smooth new 2″ Crayford focuser with no image shift up to 15 lbs. for satisfying astro-imaging sessions
  • Two locking screws on angled positions for enabling applications requiring a heavier load capacity are included
  • Stainless steel inserts on both sides and the rear provide support for taking on heavier payloads without any problems
  • Graduated scale for correct camera alignment

Patented Design

  • Stainless steel inserts on both sides and the rear provide support for tackling heavier payloads without any problems
  • Graduated scale enables correct camera alignment

Elegant Finish

  • CNC-machined aluminum tube with powder white finish and appealing gold trim accents, retractable dew shield, and lens cap
  • Supreme quality anodizing
  • Compact size and light weight make the GT71 perfect for airline travel

 

William Optics GT71 Gold Triplet APO Refractor Specifications

  • Aperture: 2.8″ (71 mm)
  • Focal Ratio: f/5.9
  • Focal Length: 420 mm
  • Resolving Power: 1.62″
  • Limiting Stellar Magnitude: 11.1
  • Objective: Triple element air-spaced with FPL-53 glass
  • Dew Shield: Retractable
  • Focuser: 2.5″ Rack & Pinion 360º rotatable camera angle adjuster with 1:10 fine focus and 1.25″ adapter
  • Field Stops: Baffles
  • Mounting Hardware: Rings with Vixen-style dovetail
  • Tube Diameter: 82 mm
  • Dew Shield Diameter: 92 mm
  • Tube Length Fully Retracted: 325 mm
  • Tube Length Fully Extended: 427 mm
  • Tube Weight: 4.9 lbs.

Additional information

Weight 34 kg
Dimensions 48 × 38 × 34 cm

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