William Optics ZenithStar 73 Doublet
- 73 mm Aperture f/5.9 Imaging Refractor Telescope
- Doublet w/ FPL-53 glass for Apochromatic performance
- Covers full frame imaging circle (44 mm)
- Two-speed 2.5" Rack & Pinion Focuser
- Colors: Available in 3 colors, Blue, Red, and Gold
- Includes Mounting rings and Vixen style dovetail
- Includes 2 Guide Scope mounting rings
- Dovetail is dual type - flip over to get Arca Swiss plate
- Weight: 2.5 kg (5.5 lb)
- Includes Interchangable Camera Mount
- Includes Dust Cover with built-in Bahtinov Mask
- Adjustable Dew Shield
The William Optics ZenithStar 73 APO Telescope is a high quality Apochromatic Imaging and visual use telescope with an aperture of 73 mm and a focal length of 430 mm or an f-ratio of f/5.9. This ZenithStar 73 APO Telescope can also be used with an interchangable camera mounting system, with various T-mounts for cameras (not included).
This ZenithStar 73 APO Telescope from William Optics is available in three colors, Blue, Red, and Gold. Choose the color you wish to buy from the drop-down menu above. All three models have the same price.
If you wish to take great astro-images with a high quality APO refractor, this William Optics ZenithStar 73 APO Telescope is a great way to achieve your imaging goals. Its FPL-53 glass air-spaced doublet lens design provides images with extreme sharpness, clear details, with APO grade color correction.
New for 2019: Now, when you purchase this ZenithStar 73 APO Telescope from William Optics, you will be assured that the optical performance of this telescope achieves a Strehl Ratio of > 0.92 (Strehl) because they are testing each optical system on a Zygo Interferometer to confirm that performance specification. In addition, each telescope is star tested by William Optics professionals to guarantee the ultimate in optical performance.
Includes a dual-spec Mounting Base (Vixen & Arca Swiss), 2.5" Dual-speed Rack and Pinion Focuser, two clamshell type Mounting Rings for the telescope, plus two adjustable Guide Scope rings, and the new innovative Bahtinov Mask cover. Also, 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 73 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.
|Telescope Type:||Doublet Apochromatic Refractor|
|Objective Aperture:||73 mm|
|Focal Length:||430 mm|
|Strehl Ratio Guaranteed:||> 0.92|
|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:||310 mm (Fully Retracted)|
|Tube Weight:||2.5 kg (5.5 lb) W/ Rings & Dovetail|
|Compatible With:||1:1 Full Frame Flattener|
|T-Mount:||Interchangable T-Mount Style for Compatibility|
|T-Rings:||None, T-Rings are available as optional accessories|