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.


Morpheus EP in 2” Barlow

  • Please log in to reply
6 replies to this topic

#1 Ain Soph Aur

Ain Soph Aur


  • *****
  • topic starter
  • Posts: 1298
  • Joined: 10 Aug 2011
  • Loc: West Tennessee

Posted 20 August 2018 - 10:02 PM

The Baader Morpheus EP’s are 1.25/2” EP’s, with the field lense way down in the 1.25” barrel. Is there anything I need to be aware of when barlowing a Morpheus? My specific concern is using a Morpheus in an Antares 2” x1.6 barlow. The Morpheus seats fine but the field lens in the 1.25” section is almost touching the top lense in the barlow. Can I expect x1.6 with this?

Edited by Ain Soph Aur, 20 August 2018 - 10:05 PM.

#2 Astro-Master


    Mariner 2

  • ****-
  • Posts: 256
  • Joined: 09 May 2016

Posted 20 August 2018 - 10:58 PM

I would try it with an 1.25" adapter.  It will work fine with the Televue Big Barlow without an adapter.

#3 Ernest_SPB



  • *****
  • Posts: 1236
  • Joined: 13 Nov 2010
  • Loc: St.-Petersburg, Russia

Posted 21 August 2018 - 12:23 AM

Can I expect x1.6 with this?

No. Difference between 1.25" and 2" setting of the Morpheus is 20 mm. So the Barlow will work with less magnification factor. If length of the LB 150 mm (for instnace), focal length would be 250 mm and actual magnification would be 1 + (150-20)/250 = 1.52x - not a big difference comparing to nominal...

Edited by Ernest_SPB, 21 August 2018 - 12:28 AM.

  • rowdy388 likes this

#4 NiteGuy



  • *****
  • Posts: 1239
  • Joined: 27 May 2013
  • Loc: Northern Arizona

Posted 21 August 2018 - 01:27 AM

I have a couple of Morpheus eyepieces and also have an Antares 1.6x barlow. I've used them together a number of times and never noticed anything unexpected or out of the ordinary. You do bring up a good point though, so I'll road test 'em tomorrow night (along with a 2" 2x barlow) and report back with what I find. Hopefully, I should be able to see where the 1.6x falls between no barlow and the 2x.

#5 russell23



  • *****
  • Posts: 9206
  • Joined: 31 May 2009
  • Loc: Upstate NY

Posted 21 August 2018 - 06:58 AM

The Morpheus are outstanding with the 1.6x Nikon 1.25” barlow.  If the Antares doesn’t work out as you want the Nikon would be an alternative.  

#6 epee



  • *****
  • Posts: 3097
  • Joined: 30 Nov 2006
  • Loc: Suh-van-nuh, Jaw-juh

Posted 21 August 2018 - 08:11 AM

I've had problems barlowing the Morpheus eyepieces due to using 1.25" barlows and not having enough in-travel on my reflector's focuser. I'm currently exploring possible solutions. A 2" barlow will certainly allow the eyepiece to fit deep enough that in-travel will no long be an issue. However, the glass clearance is going to be close on some "shorty" 2" barlows.

#7 rowdy388



  • *****
  • Posts: 2990
  • Joined: 09 Apr 2013
  • Loc: Saratoga County, NY

Posted 21 August 2018 - 11:22 AM

My Morpheus 9mm when using a 2" barlow plus 1.25-2" adaptor reach focus at about

the same point as my other eyepieces. When I take out the adaptor and use 2" mode,

I have to rake the focuser way out. Simpler for my purposes to stay in 1.25" mode.

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