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William-optics-zenithstar-66-sd.2916610

William Optics ZenithStar 66 SD

• SD glass (Japanese Ohara glass) doublet air-spaced, in CNC mac Read more

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Specifications

Feature
Value
Comment
features
Lens Design
• SD 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.
Nothing Left to Chance
• Perfect for . You can slide it directly into the mount without a dovetail 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. • Perfect for piggybacking as a guide scope. Consider our new
Beautiful Finish
• High quality powder painting. Anodized black focuser. • Can mount a for 2” accessorie usage. • available for astrophotography.
Wonderful WO Microfocuser
• William Optics rotatable Crayford focuser, smooth and precise, ideal for astrophotography. • Adjustable focuser tension. • Super-smooth and reliable 1:10 micro focuser for fine focusing during astrophotography or visual observations alike.
Attention to Packaging
• Carry-on Aluminum carrying case included in the price. Optional available. • Two-year, no fuss warranty and constant customer service! • The satisfaction of knowing you are helping someone in need with your purchase!
Specification
Aperture
66mm
Focal Ratio
F/5.9
Focal Length
388mm
Objective Type
SD Doublet, Air Spaced,
Resolving Power
1.78"
Limiting Magnitude
10.8
Lens Shade
Retractable
Focuser
1.6" (40.6mm) Crayford Focuser
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
Tube Weight
3.5lbs. (1.61kg)
Case
Aluminium Case (Standard)
Case Dimensions
15" x 9.6" x 6.5"
Case Weight
3.5lbs. (1.6kg)
Release Date
First seen
27 August 2008