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William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W

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William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W Similar Products

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William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W Product Info

William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W on sale and available from our online store. OpticsPlanet, Inc imageis an Authorized US Distributor for William Optics Telescopes.

Doublet SD APO (ZenithStar 66). F/5.9, 388mm comes with L-Based bracket, and Custom Aluminum Case (OTA Only). (W/2 speed microfocuser)


Specifications of William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W:
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
(WxHxD) 		15" x 9.6" x 6.5"
(38.5cm x 24.5cm x 16.5cm)
Case Weight 3.5lbs. (1.6kg)
· Chromatic Aberration Graph
· Spot Diagram


Features of William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W:
A small-aperture but extremely-portable APO scope at a GREAT price? ZS 66 SD Doublet APO is here to fit all your needs! At a BARGAIN PRICE !!!

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 and white: differently from anodizing does not easily gets fingerprints.

Nothing Left to Chance
• Perfect for EAZY-T Alt-Az Mount. You can slide it directly into the mount without a plate if you like.
• 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!
• Two-year, no fuss warranty and constant customer service!

Package Contents:

  • ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser

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William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W Comments

William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
William Optics ZenithStar 66mm Doublet SD APO Refractor White Tube w/ 2 Speed Focuser ZS66-SD-W
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