1/0
telescopes

William Optics ZenithStar 71mm ED Doublet APO Refractor Telescope w/ Field Flattener 6 - A-Z71A-P

William Optics   ——   SKU: WIL-A-Z71A-P
$832.87 CAD
Add to cart
Product Info
Shipping

 

About the William Optics ZenithStar 71 ED Doublet APO Refractor Telescope w/ Field Flattener 6...

Looking for a small-aperture but extremely-portable APO scope at a great price? The latest William Optics ZenithStar 71 ED Doublet APO Refractor Telescope is here to fit all your needs!

 

Excellent mechanics, fit and finish, latest WO 2" Rack & Pinion 2-speed fine focuser now are so good that they can replicate the smoothness and lack of backlash normally associated with a Crayford focuser, but with the huge advantage of much increased mechanical strength. When you choose a William Optics ZenithStar 71 ED Doublet APO Refractor Telescope, this is what you can expect...

 

Lens Design

 

-ED glass (Japanese imported Ohara glass) doublet air-spaced, in CNC machined ultra-high precision lens cell.

-Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.

 

Low C.A.

 

-Fully baffled to block all extraneous off-axis light rays and prevent glancing reflections, increasing overall contrast.

-71 mm clear aperture and F/5.9 focal ratio.

 

Nothing Left to Chance

 

-Perfect for EAZY-T Alt-Az Mount. You can slide it directly into the mount without a dovetail plate if you like.

-Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube

-Drawtube travel length 80 mm with graduated scale.

-Retractable dewshield, smallest size ever and enhanced portability!

-Can mount a WO 2" star diagonal and other 2" accessories.

 

Astrophotography APO

 

-Fast focal ratio for bright, high-quality astro-imaging.

-Includes New Flattener 6.

-Perfect for piggybacking as a guide scope!

 

Wonderful WO Microfocuser

 

-William Optics new rotatable Rack & Pinion focuser, smooth and precise, ideal during astrophotography; can be fully locked and will not flex or slip even with a very heavy camera combination.

-Adjustable focuser tension.

-Super-smooth and reliable 1:10 micro focuser for fine focusing during imaging and visual observations alike.

-Aluminum fine knob protection cover is included.

 

Attention to Packaging

 

-The basic package includes the OTA only.

-Carry-on size: you do not have to leave this treasure home!

-Two-year, no fuss warranty and constant customer service!

 

But don''t stop there. This William Optics ZenithStar 71 APO Refractor Telescope also includes Field Flattener 6. This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 ratio refractors. WO Flat 6 will provide good illumination and flat field across APS sized sensors and smaller. Just check out what makes it special...

 

APS size

 

-Designed with APS chip-size DSLR cameras in mind.

-FMC doublet design.

-Produced entirely with the best Ohara optical glasses.

 

Amazing

 

-Reducing factor 0.8X.

-It will flatten the field amazingly well and finally make you see those stars round! Differently from other brands'' refractors, this flattener works amazingly well with the popular 66-80mm F/6 refractors.

 

Superb Finish

 

-William Optics polished anodized finish.

-All internal surfaces threaded and blackened to prevent reflections.

 

Easy to Use

 

-Rotating T-ring thread for any 35mm camera.

-Will accept any standard T-ring for your camera.

 

 

William Optics ZenithStar 71 ED Doublet APO Refractor Telescope w/ Field Flattener 6 Features...

 

  • Fast focal ratio for bright, high-quality astro-imaging

     

     

  • Super-smooth and reliable 1:10 micro focuser for fine focusing during imaging and visual observations

     

     

  • Fully baffled to block all extraneous off-axis light rays and prevent glancing reflections, increasing overall contrast

     

     

  • Drawtube travel length 80 mm with graduated scale

     

     

  • Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces

     

     

  • ED glass (Japanese imported Ohara glass) doublet air-spaced, in CNC machined ultra-high precision lens cell

     

     

  • William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube

 

 

William Optics ZenithStar 71 ED Doublet APO Refractor Telescope w/ Field Flattener 6 Specifications...

Aperture: 71mm

Focal Ratio: F/5.9

Focal Length: 418 mm

Objective Type: ED Doublet, Air Spaced, Fully Multi-Coated, SMC coating.

Resolving Power: 1.58"

Limiting Magnitude: 11

Lens Shade: Retractable

Focuser: 50.8mm(2") Rack & Pinion Focuser with 1:10 Dual Speed microfocuser - 80 mm (3.2")Focuser Travel Length - 360 degree Rotatable Design

1.25" Adapter: Brass Compression Rings

L-type Mount: Integrated L Bracket (fits SmartEQ mount)

Field Stops: Baffles

Tube Diameter: 93 mm (3.66")

Tube Length: 310 mm Fully Retracted - 355 mm Fully Extended

Tube Weight: 6 lbs. (2.7 kg)

Field Flattener 6 Specifications

High-quality FMC

Lens-to-chip suggested distance: 70.51mm for F/6 APO

Reducing factor: 0.8x

Rotating T-ring adapter

Weight: 165g

William Optics Product Number: A-Z71A-P