StellaMira 2'' 0.8x Reducer / Field Flattener with M42 Adapter
 StellaMira 2'' 0.8x Reducer / Field Flattener with M42 AdapterStellaMira 2'' 0.8x Reducer / Field Flattener with M42 Adapter 

StellaMira 2" 0.8x Reducer / Field Flattener with M42 Adapter

  (5 Reviews)
✓ 2 year warranty


21x in stock shipped 1-2 working days

About this product

Model:  stellamira_2inch_0.8x_rff_m42
Part Number:  K0.8X-AU06

This useful 0.8x Reducer / Field Flattener enables DSLR astrophotography with most f/5-f/7 refractor telescopes. 

It is optimised for DSLR cameras and telescopes with f/5-f/7 focal ratios.

It will also work well with telescope focal lengths narrowly outside this optimised f/range if using an astronomy camera with a smaller sensor. 

Fully multi-coated optics fitted into a CNC machined body with a gloss black anodised finish. 

Removing the 2" nosepiece reveals M54 female thread for direct screw-on connection. 


  • 0.8x Reducer / Flattener
  • Suitable for focal ratios around f/5 - f/7.
  • High-quality, fully multi-coated optics.
  • Integrated T / M42 camera thread (can be replaced with an optional M48 adapter).
  • CNC machined body with hard, gloss, black anodised finish.
  • 2" push-fit nosepiece.
  • The 2" nosepiece is tapered for safety and accepts 2" astronomy filters.
  • Removing the nosepiece reveals M54 female thread for direct screw-on connection. 
  • Requires 55mm back focus

Customer reviews

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

Rating (max 5):  
23 January 2024  | 

Brought this for my sw 72 ed Good solid piece of kit that seems well made when used with the correct spacers it gave a nice extra field of view, a nice flat field across the image.

Rating (max 5):  
05 November 2023  | 

Recommended by FLO with my ED 72, Great bit of kit to go with my dslr. appreciate the help getting all the things I needed first time!

Rating (max 5):  
An affordable option for the 62ED
12 September 2022  | 

Purchased this is lieu of the more expensive dedicated flattener from skywatcher to attach a DSLR to my Evolux 62ed

Had to wait a week to try it out and haven't really given it a full first light try as of yet but initial checks on the moon and Jupiter through a break in the clouds show I'm able to achieve prime focus with no obvious aberration or distortion in the field of view with my M42 t ring adapter (no spacing required) very happy bunny so far!

The real MVP is Chris at FLO though who guided me through all my questions and is a real expert in his field. Thank you so much for that.

Once better skies hit the UK I'll come back to this review on the flattener itself.

Rating (max 5):  
Does the job
02 April 2021  | 

Got it in Aug 2020 after FLO recommended for use with 72 ED Skywatcher. Works well enough and flattens flied right to the end of my APSC sensor. But did need a 1mm spacer.

Knocked of one star as it introduced a slight tilt in the field, not too bad but noticeable. Would not be a problem on a CCD camera, but is not fixable when using a dslr. FLO suggested I tweak the focuser to fix the issue.

Rating (max 5):  
Stellamira reducer / flattener
10 March 2021  | 

Haven't had much chance to use it to give a fair review but FLO as always very quick to dispatch.


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