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William Optics ZenithStar 80mm f/6.8 II ED APO Refractor
| Brand | William Optics |
| Part Number | A-Z80II |
| Availability | |
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Product Info
Manufacturer Description
The newest ZenithStar II generation Doublet APO is an 80mm ED refractor ideal for everyone who needs an excellent back-up scope/ guiding scope at an excellent price, or a great first APO refractor that you can use for planetary work, wide-field imaging, and crisp, high power observations.
This is an air spaced f/6.8 refractor with 1:10 microfocuser and aluminum case included in the price. The scope boasts premium Japanese Ohara FPL-51 ED glass and Fully Multi-Coatings for an excellent sharpness and color correction.
Lens Design
- Doublet ED, using premium Ohara FPL-51 Japanese glass, air spaced, in CNC machined ultra high precision lens cell.
- Each lens is Fully Multi-Coated with best in class anti-reflective coatings.
Low CA
- Fully baffled to block all extraneous off-axis light rays and prevent glancing reflections, increasing overall contrast.
- 80 mm clear aperture.
Nothing Left to Chance
- Fully CNC machined production, no plastic parts used.
- Drawtube travel length 80 mm, with precision graduated scale.
- 1.25in adapter included.
- Brass Compression rings on the adapter: will not ruin your precious eyepieces!
Super Portable
- Retractable dewshield for enhanced transportability.
- Only 6.2 lbs. Perfect for piggybacking as guide scope.
- Optional rings, guiding rings and 0.8x field flattener/reducer are available!
Beautiful Anodizing
- Superior anodizing will not only give you a beautiful telescope, but will also protect it by making the surface much harder than natural aluminum.
- The elegant finish is stylish like a designer product! The blue OTA is particularly suited to be paired with SCTs as a guiding scope.
Wonderful WO Microfocuser
- William Optics 360-degree rotatable smooth and precise Crayford focuser.
- Adjustable focuser tension.
- Super-smooth and reliable 1:10 micro focuser for fine focusing during astrophotography or visual observations alike.
Attention to Packaging
- Exclusive Aluminum carrying case included in the price.
- Water resistant case.
- Carry-on size: you do not have to leave your treasure home!
- Two-year, no fuss warranty and constant customer service!
Reviews
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Apr 30, 2010
Focuses like butter, crisp views!
Pros:Accurate,Quality Lenses,Smooth Focuser,Compact,Strong Construction
Cons:Mirror lock
Comments:I got this scope to piggyback as an imaging scope on my 8"SCT. I couldnt be happier with it. Not only is the observing with it great, the optics are crisp and has great color, but focusing with this is like cutting through warm butter with a hot knife - it is so smooth and the dual-speed crayford is very nice to have, especially for imaging. The only thing I dont like is that when you use the lock knob for the mirror to lock the focus, it slightly moves the mirror, which changes the focus ever so slightly. Not a big deal for observing, but when imaging I have to compensate for it before locking the focus knob so when I lock it, the movement moves it into focus. Other than that, it is a fantastic scope!
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Apr 30, 2010Great scope
Pros:Compact,Strong Construction
Cons: Comments:This scope is well built and provides very clear views. I have purchased the WO rings and plate to mount this to a EQ5 mount with goto. With diagonal, 100 degree eyepiece and scope rings, the whole thing stays at under 12 lbs. This is less than half my mount's load capacity, making tracking for photos more accurate. I reversed the included foot with 3/8 inch mount so I can also use the scope without rings on a Manfrotto camera tripod to use it as a grab and go scope. Only downside is the light gathering ability and focal length of the scope keeps high power magnification out of reach. Great wide field views up to about 160x with Televue eyepieces, but after that you start getting a lower contrast image. I now plan to use this scope as a low power wide field view, mated with a second refractor with a 120mm diameter and stronger magnifications.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
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Specifications
| Telescope Aperture | 3.15" (80mm) |
| Manufacturer | William Optics |
| Telescope Aperture | Up to 80mm |
| Telescope Series | William Optics Zenith Star |
