William Optics Star 71-II f/4.9 Quadruplet APO Refractor

(1 customer review)

Latest release new updated William Optics Star-71-II f/4.9 Quadruplet APO Refractor

This new Star-71 II has a simplified four-element design that includes two FPL-53 ED glass lenses

Two ED Glass elements provide a high level of colour correction and the 4-element design is easier to collimate during manufacture, it should also hold it’s collimation better than the previous model

With it’s fast f4.9 focal-ratio and fully corrected 30mm (APS-C) imaging circle the Star-71 II is an excellent choice for astrophotography (it does not require a separate reducer/flattener)

The 2.5″ Dual Speed Rack and Pinion Focuser’s drawtube terminates in a male M48x0.75 thread and a wide M48 female threaded Canon EOS adapter ring is included. (Similar rings are available for other camera brands)

Description

Latest release new updated William Optics Star-71-II f/4.9 Quadruplet APO Refractor

This new Star-71 II has a simplified four-element design that includes two FPL-53 ED glass lenses

Two ED Glass elements provide a high level of colour correction and the 4-element design is easier to collimate during manufacture, it should also hold it’s collimation better than the previous model

With it’s fast f4.9 focal-ratio and fully corrected 30mm (APS-C) imaging circle the Star-71 II is an excellent choice for astrophotography (it does not require a separate reducer/flattener)

The 2.5″ Dual Speed Rack and Pinion Focuser’s drawtube terminates in a male M48x0.75 thread and a wide M48 female threaded Canon EOS adapter ring is included. (Similar rings are available for other camera brands)

Features of William Optics Star-71-II f/4.9 Quadruplet APO Refractor

* Clear aperture – 71mm

* Focal ratio – f/4.9

* Type – Imaging Refractor Telescope

* Optical design – 4-element design with two FPL-53 ED glass elements for enhanced colour correction

* Major feature – Does not require not a flattener/reducer

* Imaging circle size – 30mm (APS-C) imaging circle

* Focuser – 2.5″ dual speed R&P focuser

* Included in supply – tube-rings and Vixen style dovetail

* Weight: 2.4 kg / 5.3 lbs

* Focuser drawtube travel = 1.38″ / 35mm

Specifications:

* Aperture 71mm

* Focal Ratio F/4.9

* Focal Length 350.2 mm

* Objective Type 4 elements with 2 ED elements

* Imaging Circle 30mm (APS-C)

* Lens Shade  – Retractable

* Premium Focuser – 2.5″ dual speed R&P focuser

* Focuser drawtube travel 1.38″ / 35mm

* Supply includes mounting rings and Vixen style dovetail

* Total Weight 2.4 kg

Additional information

Weight 34 kg
Dimensions 48 × 32 × 32 cm

1 review for William Optics Star 71-II f/4.9 Quadruplet APO Refractor

  1. aa_webmin

    Just signed to accept the scope and gave it a visual inspection, it all looks great, no issues my end. Hopefully time and weather allow me to give it first light this weekend! Thanks again for your clear and constant communication it’s made the process a breeze, if you have a facebook or website review form I’d be happy to fill one out.
    Harry, P
    (Posted on 29/04/2017)

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