Atik Cameras

Author Topic: Back Focus again  (Read 948 times)


  • Newbie
  • *
  • Posts: 0
Back Focus again
« on: December 23, 2019, 11:12:18 PM »
Hi,  an elderly 11002 in operation and now having issues getting good star field across the chip when attached to a Takahasi Epsilon 180D.

The manual stated back focus 15.5 +/- 0.5 mm.

Is this the mechanical distance to the CCD or is it to  the optical plane of the ccd?

Any thoughts would be welcome .




  • Atik Staff
  • Full Member
  • *****
  • Posts: 240
Re: Back Focus again
« Reply #1 on: January 22, 2020, 03:01:27 PM »
Hello John,

Sorry we didn't reply sooner! 15.5 mm +/- 0.5 mm is the optical back focus for this camera, this takes into account the thickness of the optical window glass but doesn't take into account the thickness of your filters.

Best regards