Jump to content

SkySurveyBanner.jpg.21855908fce40597655603b6c9af720d.jpg

kurtz9

New Members
  • Posts

    42
  • Joined

  • Last visited

Reputation

10 Good

Profile Information

  • Location
    North Carolina
  1. Why? I recently got to compare an ES100- 20mm in an ES focal extender against an ES100-9mm without it and apart from the slight magnification difference didn't observe any significant difference at all other than better eye relief with the 20mm since a telecentric FE preserves ER. Likewise on the 82 series I compared the 30mm in the 2X focal extender to the native 82 series 14mm- again no significant difference other than enjoying the better ER with the one in the focal extender.
  2. A powermate isn't precisely just a barlow.... it's telecentric, which is why unlike a regular barlow it preserves eye relief. Just as with EPs, you can get the same thing for about half price from Explore Scientific, they call theirs a focal extender.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.