Sky-Watcher Field Flattener for EvoGuide 50ED
 Sky-Watcher Field Flattener for EvoGuide 50EDSky-Watcher Field Flattener for EvoGuide 50ED 

Sky-Watcher Field Flattener for EvoGuide 50ED

  (5 Reviews)
✓ 2 year warranty


3x in stock shipped 1-2 working days

About this product

Model:  skywatcher_FF_50ed
Part Number:  20186

NEW SkyWatcher Field Flattener for Evoguide 50 ED

Provides an evenly illuminated flat field. 

Features & Specification

  • Two-Element Design
  • Fully Multi-Coated Optics
  • 28mm Imaging Circle
  • 6º Pinpoint Stars
  • Back Focus 17.5mm
  • 1.25" (31.7mm) Internal Diameter
  • M42x0.75 Exterior Thread (T2)
  • Green Anodised Aluminium Screw-on End Caps
  • Net Weight 150g


Customer reviews

Average Rating (5 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Sky-Watcher 50ed flattener
Tuesday, 28 June 2022  | 

Construction seems fine although the lock ring on the front of the lens was a little loose. Delivery time was great considering it was over seas. My only complaint would be that the item was obviously used with dust all over the lens…it should have been appropriately sold as open box not as a new item .


We 100% never sell returned / open items as new - everything of this nature goes straight to our clearance / offers section. The only explanation for this will be that it left the factory in this condition or, it was opened by customs during shipping.

We are sorry it arrived in this state.

Rating (max 5):  
Field Flattener
Friday, 12 February 2021  | 

Again a quality piece of kit from SkyWatcher even the end caps are metal , a light and very usable addition to the already versatile evoguide 50ed scope .

Rating (max 5):  
Give your guide scope some love
Thursday, 11 February 2021  | 

I haven't had a change for first light with this yet, because of course it has been cloudy since this shipped. However, I love my EvoGuide 50ED so much more than other guide scopes (really I do!) that I felt the ED doublet deserved the accompanying flattener. This will still primarily serve as a guide scope for me, but I will also play with imaging using it.

Rating (max 5):  
Buen producto
Thursday, 3 December 2020  | 

Excelente calidad

Rating (max 5):  
Tuesday, 22 September 2020  | 

Flat stars to the edge, very nice product. I just wish the specs were listed on the webpage. Does it reduce at all? What's the % ect. No info given. Frustrating. It does yield flat stars to the edge!


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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