William Optics ZenithStar 71 ED Doublet Telescope
The ZenithStar 71 ED from William Optics is a super portable telescope with quality optics. The 71mm ED air-spaced doublet is made with Ohara glass from Japan, and is fully multi-coated with STM super high transmission coatings for high contrast, sharp views. The optics are mounted in a CNC machined precision lens cell to keep them perfectly aligned.
The CNC-machined aluminum optical tube assembly of the ZS71 comes fully baffled to prevent light bounce and a retractable dew shield to further increase contrast. The William Optics 2" rotatable rack and pinion focuser included with this scope allows for 1:10 course and fine focusing. Its mechanical strength makes for extremely smooth movements and no backlash. The focuser can be locked down and will not flex or slip, even with a heavy camera on the back, and the tension is adjustable so that you can set it to accommodate accessories of different weights. The draw tube with graduated scale has a travel length of 80mm.
This special ZS71 package comes with a 2" reducer/field flattener made of Ohara optical glass. It reduces the focal ratio by a factor of 0.8X, and does a great job of flattening the field, The Flat 6 is a fully multi-coated doublet that provides good illumination for APS sized sensors. An easy-to-use rotating t-adapter will accept any standard 35mm t-ring.
The William Optics ZenithStar 71 is the perfect telescope for the EAZY-T Alt-Azimuth Mount. It even slides directly onto the mount without the need for a dovetail.
William Optics ZenithStar 71 ED Doublet Refractor Specifications
- Aperture: 71mm
- Focal Ratio: F/5.9
- Focal Length: 418 mm
- Objective Type: ED Doublet, Air Spaced, Fully Multi Coated
- Resolving Power: 1.58"
- Limiting Magnitude: 11
- Lens Shade: Retractable
- Focuser: 2" Rack & Pinion 360º Rotatable 1:10 Dual Speed Focuser
- Reducer/Flattener: 2" doublet with 0.8X reduction.
- Tube Travel Length: 80 mm (3.2")
- Focuser Adapter: 1.25" Adapter with Brass Compression Rings
- Mount Type: Integrated L Bracket (fits SmartEQ mount)
- Field Stops: Baffles
- Tube Diameter: 93 mm (3.66")
- Tube Length: 310 mm Fully Retracted, 355 mm Fully Extended
- Tube Weight: 6 lb. (2.7 kg)
- Additional Information
SKU WO-A-Z71A-P Manufacturer William Optics Telescope Series William Optics ZenithStar Optical Design Refractor - Achromatic with ED Glass Mount Type None - Optical Tube Only Warranty 2 Year Warranty Telescope Aperture 71mm (2.79") Telescope Focal Length 418mm Telescope Focal Ratio f/5.9 Optical Tube Outer Diameter 93 mm (3.66") Length of Optical Tube 310 mm Fully Retracted, 355 mm Fully Extended Tube Color or Finish Gloss White Dew Shield Included? Yes Limiting Stellar Magnitude 11 Finder Included None Total Telescope Weight 6 lb.
- Included Items
- William Optics 71mm ZenithStar ED
- 2" Rack & Pinion Dual-Speed, 10:1 Focuser, fully rotatable
- 2" 0.8X Reducer/Field Flattener
- 1.25" Adapter
- Red L-Bracket
- Red Metal Lens Cap
- Questions & Answers
Product QuestionsQuestion by: hlritter on Jun 4, 2014 6:27:19 AMThere are two ways that you can mount this onto the 16" Meade. Both ways involve the Losmandy DM16 dovetail plate. The difference is the type of rings that you want to get for them.
If you just want to mount a telescope on the top of this, you can go for either the Losmandy 108 DVR ring set or the ADM 100mm D-Series ring set. Either one has a set of rings with three point screws like a finder scope.
If you were thinking of guiding however, the rings above might introduce flexure and you might need a more solid solution. We can order a ring set from Parallax that is custom fit to the tube size. What you would need in addition to the rings would be the Losmandy Dovetail Adapters to get them on to the DM16 dovetail plate.
What scheduled delivery means is the following (From the website).
This item is currently out of stock and while they are items we order regularly, we do require a 10% deposit as these items may be more difficult to obtain from the manufacturer and/ or require prepayment from OPT. The balance is due when it arrives. You may cancel these orders at any time.Answer by: Roderick (Admin) on Jun 4, 2014 11:58:29 AM
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