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William Optics Zenithstar 81 APO Refractor Package with 0.8x Reducer & Flattener - Gold

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SKU: WYO-A-Z81GD-AP
$1,030.00

Add Apertura 32 mm Guide Scope - Black to your order

$119.95 $89.95
 

William Optics Gold Zenithstar 81 APO Refractor Package
with 0.8x Flattener/Reducer

The William Optics telescope package is fit for incredible and successful imaging sessions! If you have been looking for the ultimate William Optics viewing experience, you have found it! Not only does this package contain all of the bells and whistles normally included with the WO Zenithstar 81 APO Refractor, but it also comes with the Adjustable 0.8x Focal Reducer/Field Flattener (P-FLAT6AIII). Get ready for the imaging package of your dreams!

William Optics ZenithStar 81 APO Refractor

The 81mm ZenithStar APO refractor from William Optics 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 the Z81 telescope have good optics, but it's also easy to use and very portable!

Equipped with FPL-53 glass, this apochromatic refractor provides beautiful colors and clear details. Z81 telescopes have an image circle that works well with Full Frame cameras, when paired with the included 6AIII flattener, by minimizing vignetting and image shifting.

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

Included Accessories

Mounting Rings

The included mounting rings are CNC machined and will assist users who are connecting the Z81 refractor to a user supplied mount. The rings are sturdy enough to safely hold the OTA in place and come in the same aesthetically pleasing gold color as the telescope's accents.

CNC Carry Handle Bar

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

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 style 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 during astro-imaging sessions.

William Optics Flat6AIII 0.8x Reducer & Field Flattener - M63 to 2"

This William Optics 2" Field Flattener & Reducer has been designed to optimize the flat-field imaging performance of the William Optics Z81 refactor. The APO triplet optics of the Flat6AIII are made with Ohara glass and fully multi-coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. The reducing factor is 0.8X.

Designed with M63 threads on the telescope side, the FLAT6AIII will thread directly into the telescope. Just remove the three screws on the focuser adapter, take off the adapter, and thread the focal reducer/field flattener on in it's stead. The Flat6AIII has 2" threads on the opposite side to accept a 48mm (Wide) T ring for your DSLR. There is even a slot behind the 2" threads to accept an M48 filter.

Adjustment distances & back focus, as well as the image circle measurement for each of the telescopes are listed below.

  • Amount of Adjustment: 5.2 mm
  • Back Focus: 60.2 mm
  • Image Circle: 44 mm