William Optics Zenithstar 73 APO
  Zoom
William Optics Zenithstar 73 APOWilliam Optics Zenithstar 73 APOWilliam Optics Zenithstar 73 APO
William Optics Zenithstar 73 APOWilliam Optics Zenithstar 73 APOWilliam Optics Zenithstar 73 APO

William Optics Zenithstar 73 APO

£549.00✓ 2 year warranty
Colour:  

:  

In stock shipped 1-2 working days.

About this product

Model:  wo_zs73_bu
Part Number:  A-Z73BU

The NEW William Optics Zenithstar 73 APO features an air-spaced doublet lens with fully multi-coated optics and an Ohara FPL-53 ED glass element for sharp, high contrast images virtually free of false-colour. 

Provides high resolution images when used for astrophotography or wildlife photography and is a convenient ultra-portable telescope for visual astronomy (think binocular astronomy targets).  

It's fast f/5.9 focal ratio and compact size makes it ideal for convenient wide field astrophotography or piggybacking. 

Supplied with mounting rings, guiding rings and Vixen-style dovetail bar.

CNC machined aluminium for a superior fit and finish. 

Dual speed 2.5" 1:10 R&P focuser.

Available in Blue, Red or Gold anodised.  

Ohara FPL-53 vs FPL-51 ED Glass

The dispersion properties of ED and SD glass elements are important in determining the overall colour correction. The abbe index is used to quantify the 'partial dispersion' of a particular glass. Pure Fluorite offers the highest partial dispersion at around 94.99 V, Ohara FPL-53 glass is very close to Fluorite at 94.93 V and is often referred to as Synthetic Fluorite.  FPL-53 is also noticeably better than Ohara's lower spec' FPL-51 glass which offers an abbe index of 81.54 V.

What's in the box

  • Telescope OTA
  • Mounting Rings
  • Guidescope Rings
  • Vixen-Style Dovetail

Specifications

Aperture 73 mm
Focal Ratio F/5.9
Focal Length 430 mm
Objective Type ED Doublet, Air Spaced,
Fully Multi-Coated, SMC coating.
Lens Shade Retractable
Tube Diameter 93mm (3.66")
Tube Length 310 mm Fully Retracted
Tube Weight 5.5 lbs. (2.5 kg)

Customer reviews

Be the first to Write a Review for this item!

FAQ

Please fill in the form below to ask a question.

*
Your Name:
*
Your Email Address:
*
Your Question:

Related Products
William Optics Finder Bracket
£49.00