Explore the Stars with the William Optics GT71 Triplet APO Refractor

Elevate your astrophotography with the William Optics Gran Turismo 71, a compact yet powerful triplet APO refractor. Featuring advanced FPL-53 glass for exceptional color correction and clarity, this telescope delivers superb image quality. The precision-engineered f/5.9 focal ratio is ideal for capturing detailed celestial images.

Designed for ease and durability, the GT71 features a robust 2.5" dual-speed focuser and a sleek CNC-machined aluminum body with a retractable dew shield. Perfect for both seasoned astronomers and enthusiastic beginners, this telescope combines top-notch functionality with stunning aesthetics.

Experience unmatched optical performance with the GT71—your portal to the cosmos.

Gran Turismo 71 APO Refractor

The stunning new William Optics Gran Turismo 71 Apo is the new jewel of the apochromatic refractor world. The new GT71 features a 3-element objective using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

Optically Unbeatable

• Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.
• Extremely sharp with excellent color correction.
• Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces
• This f/5.9 lens is ideal for astrophotography.

2.5" R&P Focuser

• Extra-smooth 2.5" R&P focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting!
• Comes with two locking screws on angled positions for heavy load applications.
• Large aluminum knob with installed thermometer.

Patented Design

• Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems.
• Graduated scale for precise camera alignment.

Simply Beautiful Finish

• Quality fit and finish: powder-painted white CNC-machined aluminum tube, red trim finish, retractable dewshield, dewshield cap.
• Top quality anodizing.
• Very compact for carrying on flights.

Standard Package：

• CNC Carry Handle/Saddle Bar with integrated Vixen-style slot for compatible guidescopes or finder brackets
• New Dual-Sided Dovetail Rail
• 2.5” R&P Focuser
• Innovative Bahtinov Mask Cover (Patented)
• M-CAA63 Camera Rotator 
• Soft Carry Case

 Specifications:

• Focal Length: 419mm
• Diameter: 71mm
• Aperture: f/5.9
• Camera Format: APS-C, Full Frame
• Focuser: 2.5" R&P Focuser
• Image Circle: > Full Frame
• Recommended Flattener: Flat6AIII
• Tube Length (Fully Retracted): 392mm
• Tube Length (Fully Extended): 470mm
• Dew shield OD: 92mm / 3.62"
• Tube Weight: 2.95 kg
• Interchangeable T-Mount (sold separately): Canon EF, Nikon F, Sony E, Pentax, Micro Four Thirds, Fuji FX