All New Gran Turismo 71 APO Refractor

In stock

2019 All New 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 360 deg. rotatable 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, gold trim finish, retractable dewshield, dewshield cap.
  • Top quality anodizing.
  • Very compact for carrying on flights.

Standard Package:

• Mounting Rings

• New 2019 CNC Carry Handle Bar

• New Dovetail Plate

• 2.5” R&P Focuser

• Innovative Bahtinov Mask Cover (Patented)

• Soft Carry Case

• Two-year, no fuss warranty and constant customer service!

Optional Accessories:

• M63 -2” Rotolock 

• 1.25” Rotolock 

• 2019 All New Slide-base 50mm Guiding Rings

• 2019 All New Slide-base UniGuide 50mm Scope

• New Full frame x0.8 Flattener 

Retracted Length:392mm

Tube with Rings and Dovetail Weight:2.93kg


2019 All New Slide-base 50mm Guiding Rings(Optional)


2019 All New Slide-base UniGuide 50mm Scope(Optional)


More Information



Focal Ratio


Focal Length


Resolving Power


Limiting Magnitude


Objective Type

3 elements Air-spaced with FPL53 glass

Lens Shade


 R&P Focuser

2.5" 360° Rotating Camera-angle Adjuster, 1:10 fine focus

1.25" Adapter

Field Stops


Type of mount

Includes mounting rings and Vixen style dovetail

Tube Diameter

82mm (dew shield tube 92mm)

Tube Length

(325 mm) Fully Retracted

(427 mm) Fully Extended

Tube Weight





Specification for Apochromatic Lenses

All WO refractors objective are double tested and inspected before shipping to our customer, these telescopes are free of coma and astigmatism.


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