William Optics ZenithStar 81 APO Doublet Refractor - Red

William Optics has discontinued the Red ZenithStar 81 APO Doublet Refractor, and we are out of stock. Here is a link to the William Optics Telescopes we carry at High Point. Hopefully, you can find a proper replacement in this selection. If we can be of further assistance, please don't hesitate to call us at 1-800-266-9590 or send an email, and we will be happy to help you. Thank you!

William Optics Red ZenithStar 81 APO Doublet Refractor

This 81mm ZenithStar APO refractor is a great addition to the ranks of telescopes that are devoted to providing fantastic astro-images through high-quality optics and chromatic aberration correction. Not only does this telescope have good optics, but it's also easy to use and very portable!

Equipped with FPL-53 glass and being apochromatic, this scope gives beautiful colors and provides clear details. This is a great telescope that has an image circle that works well with full frame camera with APS-C, which minimizes vignetting and image shifting.

Included Accessories

These mounting rings are great quality rings that will assist users when mounting the telescope to the mount. The rings are strong enough to safely hold the OTA in place and come in the color of choice so they match the telescope.

This CNC machined carry handle bar is a new design as of 2019. The beautiful bar will make traveling and moving this portable OTA a breeze. It also comes in the same color as the desired OTA accents. It also gives users the ability to connect a guide scope (not included) directly to the handle. The saddle handle accepts Synta-style dovetails.

This focuser from William Optics is a fantastic dual speed focuser with tension screws that virtually ensures the focus will keep, even as the telescope tracks through long exposures.

The included Dual Sided Dovetail (DSD) measures 210mm and has the Vixen design on one side and the Arca Swiss on the other.

The Innovative Bahtinov Mask cover from William Optics is a great way to hone in the focus of your telescope and are a great addition to any William Optics refracting OTA.

Specifications

• Aperture: 81mm

• Focal Length: 559mm

• Focal Ratio: f/6.9

• Focuser: 2.5" Rack & Pinion Dual Speed Focuser

• Tube Length: 460mm (Fully Retracted) and 560mm (Fully Extended)

• Total Weight: 3.53kg (7.78 lb)

• Compatible T Mounts (not included): Canon EF, Nikon F, Sony E, Pentax, Micro four Thirds