Jump to content


Photo

Nubee to refractors question

  • Please log in to reply
1 reply to this topic

#1 BBillyC

BBillyC

    Lift Off

  • -----
  • Posts: 9
  • Joined: 18 Oct 2011
  • Loc: Winnipeg, Manitoba

Posted 04 February 2013 - 01:32 AM

I have a TMB 130 Refractor. I have a WO Field flattener and a separate 2.7" AP telecompressor (focal reducer). I can attach the focal reducer to the back of the WO/FF, but would that be better optically or should they be used separately for different purposes. Thanks Bill

#2 Jon Isaacs

Jon Isaacs

    ISS

  • *****
  • Posts: 43392
  • Joined: 16 Jun 2004
  • Loc: San Diego and Boulevard, CA

Posted 04 February 2013 - 04:55 AM

I have a TMB 130 Refractor. I have a WO Field flattener and a separate 2.7" AP telecompressor (focal reducer). I can attach the focal reducer to the back of the WO/FF, but would that be better optically or should they be used separately for different purposes. Thanks Bill


Bill:

Looking at the A-P website, at least some of the Telecompressors are also field flatteners, I think you only want to have one field flattener in the optical path.

Jon






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics