Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Can't reach focus on an SW Esprit 120ED

  • Please log in to reply
1 reply to this topic

#1 denniruz

denniruz

    Lift Off

  • *****
  • topic starter
  • Posts: 9
  • Joined: 17 Nov 2018
  • Loc: Atlanta, GA

Posted 22 February 2020 - 04:59 PM

Ahoy, all! 

 

I have a SkyWatcher Esprit 120ED that I bought used. It came with a Feathertouch focuser and the visual back. I bought the imaging back so I could use the flattener, set it all up with exactly 75mm of backspace to the sensor on an ASI294, and I can't reach focus. I need to add about 40mm more space behind the flattener to get focus but that really messes up my corners.

 

Does anyone know what I'm missing?

 

I don't have the original focuser but if I don't get answers here my next stop is to get one from SW.

 

Thanks for reading!

 

--Dennis

 

 



#2 fate187

fate187

    Mariner 2

  • *****
  • Posts: 276
  • Joined: 16 May 2015
  • Loc: Saxony, Germany

Posted 22 February 2020 - 05:01 PM

Put the extension in front of the flattener, instead of behind it.


  • OldManSky likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics