Sky-Watcher 0.77x Reducer for Esprit 120ED Triplet

Sky-Watcher 0.77x Reducer for Esprit 120ED Triplet

  (1 Review)
✓ 2 year warranty


Out of stock due 2-4 working days

About this product

Model:  skywatcher_reducer_esp120
Part Number:  20095

Optically matched for the Sky-Watcher Esprit-120 ED Triplet refractor telescope.

Provides a fully illuminated and corrected 34mm image circle suitable for sensor formats up to APS-C. 

This three-element focal reducer/flattener has a reduction factor of 0.77x. for imaging at f5.4.

55mm back focus for use with M48 Canon EOS or Nikon adaptor rings. 

Includes a standard adaptor with M48 thread. 

Removing the adaptor reveals an M71x1 internal thread with maximum 75mm back focus for self-made adaptor solutions. 


Features & Specification

  • Three-element design
  • Fully Multi-Coated optics
  • 34mm Imaging Circle
  • 2-Inch filter compatible
  • 75mm back focus or 55mm with supplied adaptor
  • M48x0.75 adapter
  • Green anodised aluminium screw-on end caps
  • Net weight 910g (with end caps)


Customer reviews

Average Rating (1 Review):  
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Sky-Watcher 0.77x Reducer for Esprit 120ED Triplet
01 June 2021  | 

The 0.77 Reducer is absolutely excellent, working brilliantly with the Esprit 120 (focal length 840mm at f7) and giving me a whole lot of new options, presenting me with a telescope of focal length 650mm at f5.3.
It produces exquisite details and perfect stars
I now have an additional telescope thatís fits in between my Esprit 120 and W.O. Zenithstar 81 (440mm with its reducer).
I did require some help from FLO in fitting the reducer. I did not realise that it has to inserted deep into the focusing tube of the telescope to engage with the screw thread!


Please fill in the form below to ask a question.


Q1. Is this necessary if I use the EvoGuide 50ED only as a guidescope?

No. Guiding software is only interested in the centre of the star and is usually very tolerant of star shape so a flattener is not necessary.

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