William Optics GuideStar 61
  Zoom
 William Optics GuideStar 61William Optics GuideStar 61 

William Optics GuideStar 61

£399.00✓ 2 year warranty
Choose:  

:  

Usually shipped 1-2 working days.
Request a Price Match

About this product

Model:  wo_M-GS61-gd
Part Number:  wo_M-GS61-gd

2019 GuideStar 61

Use as a portable high quality imaging scope or an ultra-high quality guidescope.

The new William Optics GuideStar 61 APO features the same high quality FPL53 ED doublet lens as the Zenithstar 61 so delivers sharp, high contrast images virtually free of false-colour. 

Other features include a new lightweight optical tube with draw-tube (push-pull) focuser for coarse focusing and a rotating lens assembly for fine focus. 

Two flatteners are available for the GuideStar 61: the existing Adjustable Flattener for the ZS61 and a new 0.8x Reducer/Flattener. 

CNC machined aluminium for a superior fit and finish. 

Supplied with a Vixen/Synta style finder dovetail rail (for a finder-scope) and a soft carry case. 

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.

Specification

  • Focal Length: 360mm
  • Diameter: 61mm
  • Focal Ratio: F5.9
  • Tube Length: 340mm
  • Tube Weight: 1.44kg

Telescope Field of View Simulator

 

 

 



 

Customer reviews

Be the first to Write a Review for this item!

FAQ

Please fill in the form below to ask a question or request a price match.

*
Your Name:
*
Your Email Address:
*
Your Question / Request:
URL of the Cheaper Price:
If you are requesting a price match please let us know the URL where you have seen the product cheaper.

Related Products

Christmas at FLO:    Extended Returns    |    Last Delivery Dates    |    Astronomers Gift Guide    |    Kids Gift Guide    |    Beginners Telescope Guide    |    New Telescope Accessory Guide    |    Gift Vouchers