William Optics GT81 Triplet APO Refractor - No DDG or Flattener

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William Optics GT81 Triplet APO Refractor - No DDG or Flattener
$928.00
Item # WO-A-F81GT
1 Questions(s)

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  • This William Optics GT81 Triplet APO Refractor Telescope has an f/5.9 focal ratio, making it ideal for astrophotography.
  • Each lens used in the GT81 is fully multi-coated with a special super-high transmission coating (STM Coating) on all surfaces.
  • The 2.5" dual-speed rack and pinion focuser has 1:10 micro focusing, rotates a full 360°, and comes with two locks.
  • Accessories include an L bracket with carry handle and guiding finder rings. This model does not include the integrated field flattener.
Description

Details

William Optics GT81 Triplet APO Refractor Telescope

The stunning William Optics GT81 Triplet APO Refractor is a jewel of the apochromatic refractor world. From the pristine white finish on the CNC-machined optical tube assembly to its elegant red finish, this telescope has more than just good looks. The GT81 features a triplet designed by using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.


William Optics GT81 APO Triplet Refractor Telescope Features...


  • Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell
  • Extremely sharp
  • Excellent color correction
  • Each lens is fully multi-coated with a special super-high transmission coating (STM Coating) on all surfaces
  • F/5.9 lens is ideal for astrophotography
  • 2" & 1.25" adapter included
  • Anti-marring brass compression rings
  • Carry handle with V-shape night glowing illuminator
  • Two year William Optics Warranty

2.5" Rack & Pinion Focuser


  • Extra-smooth 360º rotatable 2.5" Rack & Pinion 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 knobs allow for easy focusing, even when wearing gloves
Images depict some accessories not included with this package.
Additional Information

Additional Information

SKU WO-A-F81GT
Manufacturer William Optics
Telescope Series William Optics GT
Optical Design Refractor - Apochromatic
Mount Type None - Optical Tube Only
Warranty 2 Year Warranty
Telescope Aperture 3.18"
Telescope Focal Length 478mm
Telescope Focal Ratio f/5.9
Optical Tube Outer Diameter 90mm
Length of Optical Tube 440mm retracted, 484mm extended
Tube Color or Finish Gloss White
Dew Shield Included? Yes
Limiting Stellar Magnitude 12.2
Finder Included None
Total Telescope Weight 8 lb.
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Included Items

Included Items

  • William Optics GT81 Triplet APO Refractor Telescope
  • 2.5" Rack & Pinion Dual Speed Focuser
  • Retractable Lens Shade
  • 2"-1.25" Adapter
  • L-Bracket with Carry Handle
Questions & Answers

Product Questions

Does the William Optics GT81 Triplet APO come with a Vixen
type saddle to place on my Celestron AVX mount.

Thanks, De Lorme
1
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