Jump to content


Photo

CEM60-6 Months, 2 Mounts and some observations

  • Please log in to reply
78 replies to this topic

#76 TimP

TimP

    Sputnik

  • -----
  • Posts: 47
  • Joined: 24 Feb 2009

Posted 02 September 2014 - 07:50 PM

I rarely use my c11 HD at f10 . I usually use a focal reducer and run at about f5. I am new to the CEM60 . I just moved over from a CGEM DX. I was not one of the lucky ones that received a trouble free CGEM and I finally threw in the towel . I am not looking to do a lot of long exposure imaging although I may give it a shot someday. I mostly just do video astronomy with my Mallincam for now. I also have an iEQ45 Pro that I use with a C8 HD SCT and a Lunt 60 mm DS. Both of these mounts have not seen first light due to the weather. I think I may have caused a disturbance in the force with 2 new mounts. Sorry about the weather guys. In a couple of weeks I will be going to a star party called ECVAR (East Coast Video Astronomy Rendezvous) in Galax, Virginia for a week with my friends from nightskiesnetwork.com  . We will be broadcasting from there. I hope to get any bugs worked out on these mounts at that time.

 

Tim Patton



#77 neptun2

neptun2

    Viking 1

  • -----
  • Posts: 797
  • Joined: 04 Mar 2007
  • Loc: Bulgaria

Posted 02 September 2014 - 08:24 PM

Well except for the 130mm APO that x6gas have tested did anybody try large APO triplet on cem-60? Will it be able to handle APOs up to 150mm with focal length around 1000mm at scale of around 0.9 to 1 arcsec per pixel and guide well enough to achieve 10 minute exposures with round stars? 



#78 Astronewb

Astronewb

    Apollo

  • *****
  • Posts: 1271
  • Joined: 19 Sep 2011
  • Loc: Connecticut

Posted 02 September 2014 - 09:34 PM



Well except for the 130mm APO that x6gas have tested did anybody try large APO triplet on cem-60? Will it be able to handle APOs up to 150mm with focal length around 1000mm at scale of around 0.9 to 1 arcsec per pixel and guide well enough to achieve 10 minute exposures with round stars? 

Here's some results at 10 minutes with a AR152mm, 988/F6.5 guided, it's not a triplet but the basic parameters are the same.  Mount was a CEM60EC, not a CEM60.

 

14847434495_b1f37c9b59_c.jpgIC59_AR152/Baader Fringe Killer by Astronewb2011, on Flickr

 

Regards...Paul



#79 neptun2

neptun2

    Viking 1

  • -----
  • Posts: 797
  • Joined: 04 Mar 2007
  • Loc: Bulgaria

Posted 02 September 2014 - 11:00 PM

This looks encouraging. Focal length and resolution are very similar. The doublet is nearly 4 kg lighter but this are some good news anyway. Thanks.  








Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics