Used William Optics 66mm Zenith Star Doublet Refractor - UT-11807 - SOLD

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  • $189.00
  • Regular price $329.00

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  • This is a used scope in very good condition*


Used William Optics 66mm Zenith Star Doublet Refractor - UT-11807 - SOLD

Specifications of William Optics Zenith-Star 66mm Doublet SD APO Refractor Telescope w/ 2 Speed Focuser.

Aperture 66mm
Focal Ratio F/5.9
Focal Length 388mm
Objective Type SD Doublet, Air Spaced,

Fully Multi-Coated, STM Coatings

Resolving Power 1.78"
Limiting Magnitude 10.8
Lens Shade Retractable
Focuser 1.6" (40.6mm) Crayford Focuser

Adjuster, 1:10 Fine Focus

63mm (2.5") Focuser Travel Length

Rotatable Focuser Design

1.25" Adapter Brass Compression Rings
L- type Mount L Bracket Based
Field Stops 10 Baffles
Tube Diameter 2.95" (75mm)
Tube Length 11.8" (300mm) Fully Retracted

14.2" (360mm) Fully Extended

Tube Weight 3.5lbs. (1.61kg)
Case Aluminium Case (Standard)
Case Dimensions


15" x 9.6" x 6.5"

(38.5cm x 24.5cm x 16.5cm)

Case Weight 3.5lbs. (1.6kg)

Features of William Optics Zenith-Star 66mm Doublet SD APO Refractor Telescope w/ 2 Speed Focuser.

Sharp to the edge and color free, no other scope will beat it's price/quality ratio! Excellent mechanics and fit and finish, Crayford 2-speed fine focuser, super-high transmission multi-coating, aluminum case. Fast focal ratio makes it your ideal fast set-up for travel astrophotography or piggybacking.

Lens Design

• SD glass (Japanese Ohara glass) doublet air-spaced, in CNC machined ultra-high precision lens cell.

• Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.

Low C.A.

• Fully baffled to block all extraneous off-axis light rays and prevent glancing reflections, increasing overall contrast.

• 66 mm clear aperture.

• Glossy metallic paint in blue: different from anodizing, does not easily show fingerprints.

Nothing Left to Chance.

• Fully CNC machined production, no plastic part used.

• Drawtube travel length 63 mm with graduated scale.

Super Portable

• Retractable dewshield, smallest size ever and enhanced portability!

• SCT thread adapter to 1.25" eyepieces with anti-marring brass compression ring.

• Can mount a WO 2" SCT star diagonal for 2" accessories usage.

Astrophotography super-apo

• Fast focal ratio for bright, high-quality astro-imaging.

• Dedicated field reducer/flattener available.

• 2" adapter available for astrophotography.

• Perfect for piggybacking as guide scope. Consider William-Optics new guiding rings!

Wonderful WO Microfocuser

• William Optics rotatable Crayford focuser, smooth and precise, ideal during astrophotography.

• Adjustable focuser tension.

• Super-smooth and reliable 1:10 micro focuser for fine focusing during imaging and visual observations alike.

Attention to Packaging

• Exclusive aluminum case or soft carrying bag included in the price.

• Water resistant.

• Carry-on size: you do not have to leave your treasure home!


ConditionVery good
ManufacturerWilliam Optics
Warranty90 Day


  • William Optics 66mmSD optical tube
  • V size mounting shoe
  • 1.25" star diagonal
  • Caps and hard carry case
  • * The scope has some small scratches on tube from normal use-overall very good condition *


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