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William Optics Gran Turismo 71 APO Refractor with Flattener

SKU : WO-A-F71GTII-AP

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  • Telescope tube weight: 4.9 lbs
  • Focal length: 420 mm
  • Focal ratio: f/5.9
  • Aperture: 71 mm
  • Includes Flat6AIII for a more complete astrophotography experience.

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 TypeFPL53
    Limiting Magnitude11.1
    Optical DesignTriplet Refractor
    Tube Length325mm
    Tube Weight2.8kg (6.1 lbs)
  • included items

    • William Optics Gran Turismo 71 APO Refractor
    • Built-in Bahtinov Mask
    • CNC Handle Bar
    • 2.5" R&P Focuser
    • Soft Carry Case
    • Flat6AIII Flattener

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