Product Highlights- 81 mm Aperture f/6.9 Imaging Refractor Telescope
- FPL-53 glass for color free Apochromatic performance
- Covers full frame imaging circle (44 mm)
- 2.5" R & P Focuser
- Colors: 3 colors available, Blue, Red, Gold
- Includes Mounting rings and Vixen style dovetail
- Dovetail is dual type - flip over to get Arca Swiss plate
- Weight: 3.53 kg
- Includes Interchangable Camera Mount
- Includes Dust Cover with built-in Bahtinov Mask
The William Optics ZenithStar 81 APO Telescope is a high quality
Apochromatic Imaging and visual use telescope with an aperture of 81 mm
and a focal length of 559 mm or an f-ratio of f/6.9. This ZenithStar 81
APO Telescope can also be used with an interchangable camera mounting
system, with various T-mounts for cameras (not included).
The William Optics ZenithStar 81 APO Refractor is available in three
colors, Blue, Red, or Gold. Choose the color of the telescope you wish
to order from the drop-down menu above. All models have the same price.
If you wish to take great astro-images with a high quality APO
refractor, this William Optics ZenithStar 81 APO Telescope is a great
way to obtain your imaging goals. Its FPL-53 glass air-spaced doublet
lens design provides images with extreme sharpness, clear details, with
APO grade color correction.
Includes a dual-spec Mounting Base (Vixen & Arca Swiss), 2.5"
Dual-speed Rack and Pinion Focuser, CNC Carry Handle (with easy mount
design for the optional guiding scope), clamshell type Mounting Rings
for telescope, and the new innovative Bahtinov Mask cover. And this gem
of a telescope is relatively small and easy to store or transport.
Introducing a first innovative feature in the industry: Now this
ZenithStar 81 APO Telescope from William Optics comes standard with a
dust cover that has a built-in, clear Bahtinov Mask for perfect focusing
every time. Simply remove the flat front cover plate, leaving the dust
cover cuff in place on the telescope. Point the telescope at a bright
star, and focus carefully. When the bright central diffraction spike
looks exactly centered between the other two spikes forming an "X", then
your telescope is in exact focus for stars. Remove the dust cover cuff
carefully from the objective end of the telescope, and you are ready to
image.
Specifications:
Product Number: |
A-Z81 |
Telescope Type: |
Doublet Apochromatic Refractor |
Objective Aperture: |
81 mm |
Focal Length: |
559 mm |
Focal Ratio: |
f/6.9 |
Focuser: |
2.5" Dual-Speed R & P Focuser |
Camera Format: |
Full Frame/APS-C Image Compatible |
Tube Color: |
Available in Blue, Red, or Gold |
Tube Length: |
460 mm (Fully Retracted), 560 mm (Extended) |
Tube Weight: |
3.53 kg W/ Rings & Dovetail |
T-Mount: |
Interchangable T-Mount Style for Compatibility |
T-Rings: | None, T-Rings are available as optional accessories |
In the Box
- ZenithStar 81 APO Doublet Refractor
- 2.5" Rack & Pinion Focuser