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William Optics Gran Turismo 71 APO Refractor


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  • Telescope tube weight: 4.9 lbs
  • Focal length: 420 mm
  • Focal ratio: f/5.9
  • Aperture: 71 mm

Product Details

  • 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. 

    William Optics GT71 Refractor Side View

    2" V-power Focuser

    • Extra-smooth new 2" Crayford focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting (up to 15Lb.)!
    • Comes with two locking screws on angled positions for heavy load applications.
    • Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems.
    • Graduated scale for precise camera alignment.
    • Innovative Bahtinov Mask Cover (Patented) included

    William Optics GT71 Refractor Focuser Close Up View

    Simply Beautiful Finish

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

    William Optics GT71 Refractor Top Side View

  • specifications

    Aperture71 mm (2.75")
    Focal Length420 mm
    Focal Ratiof/5.9
    Free ShippingYes
    Glass TypeFLP53
    image circle42mm
    Limiting Magnitude11.1
    Optical DesignTriplet Refractor
    Tube Length325mm
    Tube Weight2.8kg (6.1 lbs)
  • included items

    • Telescope tube weight: 4.9 lbs
    • Focal length: 420 mm
    • Focal ratio: f/5.9
    • Aperture: 71 mm

Product Reviews

Customer Reviews
5.0 Based on 2 Reviews
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Kapil K.
United States United States
WO GT71 APO Triplet.

Very well made refractor. Lightweight, yet has clear and crisp views. It is really good for viewing. I haven’t yet tried astrophotography with it. But I am already impressed with the viewing/observing experience. Nice to see pleiades cluster, double cluster and Christmas tree cluster in a single view. The focuser is especially good. Looking forward to more opportunities to view and photograph. Overall, a good purchase.

Gerrad K.
United States United States

I’ve been doing astrophotography for 4 years and after a lot of research I gave the WO 71GT a try. Remarkable!! It’s so lightweight and the built in handle is great. I truly love the built in bahtinov mask. This is a really great telescope and I can’t wait to see what I can shoot with it.

OPT Telescopes William Optics Gran Turismo 71 APO Refractor ReviewOPT Telescopes William Optics Gran Turismo 71 APO Refractor Review