FREE SHIPPING

On Hundreds of Products details ›

CALL US TOLL FREE 800-266-9590

William Optics ZenithStar 81 APO Doublet Refractor - A-Z81

SKU: WYO-A-Z81

Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

free shipping free shipping

One of the many benefits to becoming a customer of High Point Scientific is that you receive Unlimited Tech Support on all of the products you purchase from us.  We understand that many of our products are technical in nature and require support.  Rest assured that our team of Telescope and Telescope Accessory experts will be standing by (800.266.9590) to support you for as long as you own one of our products!  

Our price: $798.00

* Required Fields

Our price: $798.00
Bread Checkout
 

William Optics 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


Mounting Rings



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.



CNC Carry Handle Bar



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.



2.5" Rack & Pinion Focuser



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.



Dual Sided Dovetail



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



Bahtinov Mask



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



Please Note : When ordering the WO ZenithStar 81 APO Refractor, please choose the desired accent color: Red, Blue, or Gold.


Description
Description

William Optics 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

Mounting Rings

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.

CNC Carry Handle Bar

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.

2.5" Rack & Pinion Focuser

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.

Dual Sided Dovetail

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

Bahtinov Mask

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

Please Note : When ordering the WO ZenithStar 81 APO Refractor, please choose the desired accent color: Red, Blue, or Gold.

Specifications
Specifications
Model Number A-Z81
Telescope Series William Optics ZenithStar
Focal Ratio f/6.9
Optical Design Refractor
Telescope Aperture 81mm (3.19")
Telescope Mount Type No Mount - OTA Only
Type of Electronics OTA Only - No Electronics
Number of Refractor Elements 2 (Doublet)
Focal Length (mm) 559mm
Optical Coatings FPL-53 Glass
Image Circle > Full Frame (with PFlat 6AIII, not included)
Focuser Style Rack & Pinion
Focuser Size 2.5"
Focuser Speed Dual Speed
Refractor OTA Length - Extended (in.) 22.05" (560mm)
Refractor OTA Length - Retracted (in.) 18.11" (460mm)
Telescope OTA Weight (lb.) 6.6 lb. (3kg)
Warranty Two (2) Years
What's in the Box?
What's in the Box?
  • ZenithStar 81 APO Doublet Refractor
  • Mounting Rings
  • CNC Carry Handle Bar
  • 2.5" Rack & Pinion Focuser
  • 210mm DualSide Dovetail
  • Bahtinov Mask and Cap
Our Customer Commitment
  • Fast Shipping, Same or Next Day: You made the commitment to purchase, now you want that new item fast, we get it! At High Point all in stock orders ship within 24 hours, pending internal credit card approval.Read more ...
  • Unlimited Tech Support Forever: One of the many perks of being a High Point customer is that you get access to our tech support team forever! We are astronomers at heart and truly enjoy helping fellow amateurs achieve success in the field! Read more ...
  • 30 Day Return Policy: Ordered the wrong product? Don't worry, we'll take the majority of our products back within 30 days of the purchase date.We want to get you into the observing setup that bests fits your needs. Read more ...
  • Guaranteed Price Match: Call or email us if you find a better price on a product! Provide a link for our team to confirm the price and within a matter of seconds you'll have a price match providing the re-seller is within the USA and authorized by the manufacturer to sell the product of interest. Read more ...
  • We're Your Connection To The Manufacturer: In the event there is a warranty issue with a product purchased from High Point, we will serve as the liaison between you and the Manufacturer. The net result is faster, more attentive service from the Manufacturer and an enhanced customer experience. Read more ...

Please wait...