William Optics
William Optics ZenithStar 61II Doublet Refracting Telescope - Red
William Optics ZenithStar 61II Doublet Refracting Telescope - Red
SKU:WO-ZS61II-D-RED
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William Optics ZenithStar 61II Doublet Refracting Telescope – Red
Product Description
The William Optics ZenithStar 61II Doublet Refracting Telescope is a compact apochromatic refractor designed for wide-field astrophotography and portable observing. Its 61mm FPL-53 doublet optics, 360mm focal length, and fast f/5.9 focal ratio deliver sharp, high-contrast images with excellent color correction. Its compact design and precision dual-speed focuser make it an excellent choice for astrophotographers who need a lightweight and travel-friendly telescope.
Technical Specifications
| Specification | Details |
|---|---|
| Model | William Optics ZenithStar 61II |
| Color | Red |
| Optical Design | Doublet APO Refractor |
| Aperture | 61mm (2.5") |
| Focal Length | 360mm |
| Focal Ratio | f/5.9 |
| Glass Type | FPL-53 Synthetic Fluorite / ED Glass |
| Image Circle | 45mm |
| Focuser | 2" Rack & Pinion |
| Focuser Speed | Dual-Speed 10:1 |
| Focuser Travel | 75mm |
| Camera Format | Full Frame, APS-C, M4/3 |
| Camera/Eyepiece Connection | M54 to 2" / 2" to 1.25" |
| Resolution – Dawes | 1.9 arcseconds |
| Light Gathering Power | 76x |
| Limiting Magnitude | 12.7 |
| Tube Length | Approx. 245mm–315mm |
| OTA Weight | Approx. 2.2kg |
| Mounting System | Vixen / Arca-Swiss Compatible Dovetail |
| Flattener Compatibility | William Optics FLAT61A / FLAT61R |
| Focusing Aid | Integrated Bahtinov Mask |
| Warranty | Manufacturer Warranty Included |
What Comes in the Box?
The package includes the William Optics ZenithStar 61II f/5.9 Doublet Refractor OTA, integrated Bahtinov mask lens cap, 2-inch dual-speed rack-and-pinion focuser, CNC-machined mounting ring, CAT handle bar, 210mm dovetail plate, and soft carry case. The telescope also includes the necessary adapters for common 2-inch and 1.25-inch connections.
Why Buy from Sky Deep?
Sky Deep Co. is a specialist astronomy equipment supplier in Pakistan, offering genuine equipment through authorized import channels. With 25+ years of combined astronomy experience, Sky Deep provides expert product guidance, after-sales support, a local repair facility, and astronomy equipment solutions for individual users as well as observatories and B2B projects. Its focus on authentic equipment and technical assistance makes it a trusted choice for purchasing the William Optics ZenithStar 61II in Pakistan.
FAQs
Is the William Optics ZenithStar 61II good for astrophotography?
Yes. Its 61mm FPL-53 optics, fast f/5.9 focal ratio, wide field of view, and precision focuser make it particularly well suited to astrophotography.
What is the focal length of the ZenithStar 61II?
The telescope has a 360mm focal length with an f/5.9 focal ratio.
Is the ZenithStar 61II full-frame compatible?
Yes. William Optics lists the ZenithStar 61II as compatible with full-frame, APS-C, and Micro Four Thirds camera formats. A suitable field flattener may be required for optimal full-frame imaging.
Does it include a Bahtinov mask?
Yes. The lens cap incorporates an integrated Bahtinov mask that helps achieve precise focus during astrophotography.
Does the ZenithStar 61II come with a mount?
No. The ZenithStar 61II is sold as an optical tube assembly (OTA). A suitable astronomical mount or tracking mount must be purchased separately for a complete imaging setup.
