About this product
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
- M42x0.75 adapter (T2)
- Green anodised aluminium screw-on end caps
- Net weight 910g (with end caps)
|Average Rating (1 Review): |Sky-Watcher 0.77x Reducer for Esprit 120ED Triplet
Tuesday, 1 June 2021 | Allen
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.