William Optics GT102 102mm f/6.9 Apo Refractor - 20th Anniversary Edition (Gold) # A-F102GTSG-VP20A

Our Price: $2,398.00
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Our Product ID: T-WO-F102GTSG-VP20A
Manufacturer SKU: A-F102GTSG-VP20A
Item Can Ship: Worldwide
William Optics GT102 102mm f/6.9 Apo Refractor - 20th Anniversary Edition (Gold) # A-F102GTSG-VP20A

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Product Details

Latest version with patented Bahtinov Mask cover!

The new 2018 GT102 three-element super apo telescope from William Optics offer superb quality for imaging and visual use at an affordable price.

The package includes:

  • GT 102 three element design with FPL-53 and other ED element glass
  • Tube mounting rings, CNC carry handle, and Guidescope rings
  • Innovative Bahtinov Mask Cover (Patented)
  • Soft carrying case
  • Retractable dew shield with lock screw
  • All-new 3" Victory Edition Crayford design with 360-degree rotatable focuser
  • 2 speed knobs 1:10 
  • Aperture: 102mm F6.9
  • Free Vixen-style dovetail plate
  • Weight: 11 lb; length: 27"

The stunning new William Optics GT 102 APO is the new jewel of the apochromatic refractor world. From the pristine white finish on the CNC to the elegant trim, this beauty has more than just good looks. The new GT 102 features a 3-element objective using high-quality FPL-53 glass and combined with other extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

Optically Unbeatable

  • Three-element air-spaced primary 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/6.9 is geat for astrophotography.
  • Triple testing each lens by Zygo test to ensure the best optical quality.

Simply Beautiful Finish

  • Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube.
  • Retractable dewshield and dewshield cap.
  • 360-deg rotatable all-new R&P focuser.
  • Top quality anodizing.

Attention to Details

  • 2" & 1.25" adapter included in the price.
  • Anti-marring brass compression rings.
  • Mounting rings / dovetail / giodescope rings included.
  • 2-year warranty from William Optics.

Specification for William Optics Apochromatic Lenses

All William Optics refractor objectives are double tested and inspected by WO at their factory. These telescopes are free of coma and astigmatism. Since all individual lens surfaces are machine coated, sometimes you may notice minor visual imperfections which will not compromise the optical performance of the telescope. The dimensions of scratches and points shall not exceed the following values:

  • Scratches - Maximum Width: 0.025 mm
  • Scratches - Maximum Length: 1/4 of total lens diameter
  • Scratches - Maximum Quantity: Three
  • Dots or Spot Points - Maximum Diameter: 0.4 mm
  • Dots or Spot Points - Maximum Quantity: Three
  • Accumulation of Defects - Limited Area: 0.8mm^2
  • Accumulation of Defects - Total Area: 5.8mm^2

Useful Resources

  • Product Review: Review by Astronomy Magazine (PDF format, 416KB)
  • Manufacturer William Optics
    Aperture 102mm
    Focal Ratio F/6.9
    Focal Length 703mm
    Objective designed 3 elements with FPL53  and ED together
    Resolving Power 1.13 arc "
    Limiting Magnitude 13.9
    Image Circle Full frame
    Lens Shade Retractable
    Focuser OD 3" Victory Ed. Crayford focuser, 360° Rotating Camera-angle Adjuster. 1.25" Adapter Included
    1.25" Adapter Brass Compression Rings
    Tube Diameter 105mm
    Mounting Rings Provided
    Tube Length 27" (689mm) Fully Retracted
    Tube Weight 11 lbs. (5.0kg)
     Case High Quality Soft Case included
    Case Dimensions
    (W x H x D)
    31" x 10" x 13 "
    (78cm x 25m x 34cm)

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