William Optics ZenithStar 66 SD Doublet APO f/5.9

Catalog description

William Optics ZenithStar 66 SD Doublet APO f/5.9, part number WIOP026, is a discontinued product from the 2007–2011 catalog. It was last listed at $448.00, up from a low of $339.00.

ZenithStar 66mm SD Doublet APO Refractor OTA - White Package deal w/ 1.25-inch Dielectric Diagonal A small-aperture but extremely portable APO scope at a great price? ZS 66 SD Doublet APO is here in three colors to fit all your needs! Sharp to the edge and color-free no other scope will beat its price/quality ratio! Excellent mechanics and fit and finish Crayford two-speed fine focuser super-high transmission multi-coating aluminum case. Fast focal ratio makes it your ideal fast setup for travel astrophotography or piggybacking.

LENS DESIGNSD 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. NOTHING LEFT TO CHANCEAvailable in blue and orange! Fully CNC-machined production no plastic part used. Drawtube travel length 63mm with graduated scale. Brass compression rings on the adapter: will not ruin your precious eyepieces!

SUPER PORTABLERetractable dewshield smallest size ever and enhanced portability! SCT thread adapter to 1.25-inch eyepieces. Perfect for piggybacking as guide scope.

BEAUTIFUL ANODIZINGSuperior anodizing will not only give you a beautiful telescope but also protect it by making the surface much harder than natural aluminum. Can mount a WO 2-inch SCT star diagonal for 2-inch accessories usage. 2-inch adapter available for astrophotography. WONDERFUL WO MICROFOCUSERWilliam 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 PACKAGINGExclusive aluminum carrying case included in the price. Optional soft carrying case available. Water-resistant. Carry-on size: you do not have to leave your treasure home! Two-year warranty and constant customer service!

SpecificationsAperture - 66mmFocal Ratio - F/5.9Focal Length - 388 mmObjective Type - SD Doublet Air Spaced Fully Multi-Coated STM coatingResolving Power - 1.78Limiting Magnitude - 10.8Lens Shade - RetractableFocuser - 1.6-inch (40.6 mm) Crayford Focuser Adjuster 1:10 fine focus 60 mm (2.4-inch) Focuser Travel Length Rotatable Design 1.25-inch Adapter - Brass Compression RingsL-type Mount - L Bracket BasedField Stops - 10 BafflesTube Diameter - 2.95-inch (75 mm)Tube Length - 11.8-inch (300 mm) Fully Retracted 14.2-inch (360 mm) Fully ExtendedTube Weight - 3.5 lbs. (1.7 kg)Case - Aluminium Case (Standard)Case Dimensions - 15W x 6.5D x 9.6H inchesCase Weight - 3.7 lbs. (1.6 kg)

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