Jump to content


Photo

Crab Nebula ,12 inch f4 with ASA reducer

  • Please log in to reply
6 replies to this topic

#1 Suresh

Suresh

    Mariner 2

  • -----
  • Posts: 235
  • Joined: 05 Aug 2005
  • Loc: South India

Posted 05 February 2013 - 12:46 AM

Hi friends,
Afew members were skeptical when i ordered the 12 inch Newtonian weighing 40 pounds without mounting rings and the heavy Losmandy type dovetail.Astrophysics mount handled this like a toy when i fixed the original dovetail and RMS while guiding was showing 0.25.i have not yet fixed the dent on the tube which is preventing the ring holding the tube adequately causing some tube flexion which will reduce the RMS further
I wanted to shoot Crab nebula as it is not an easy target, the first test shot i took 20 minutes to get all saturated stars, so i shifted to 10 minutes x19 .
here is the image and thanks for looking
more details are at the link
Suresh

http://tinyurl.com/b53vrxu

#2 nytecam

nytecam

    Voyager 1

  • *****
  • Posts: 11455
  • Joined: 20 Aug 2005
  • Loc: London UK

Posted 05 February 2013 - 05:03 AM

Hi - nice M1 :bow: I use my 12" SCT @ f/3.7 [close to your f/4 Newt] via OSC cam in very brief exp on M1 last December. I'm not suggesting you resort to my brief exps [it suits my work] but why this relatively bright object needs x75 my exp puzzles me ;)

Attached Files



#3 Suresh

Suresh

    Mariner 2

  • -----
  • Posts: 235
  • Joined: 05 Aug 2005
  • Loc: South India

Posted 05 February 2013 - 07:32 AM

I guess a mono camera and dark skies make a big difference!

#4 Mike Wiles

Mike Wiles

    Viking 1

  • -----
  • Posts: 950
  • Joined: 04 Feb 2009
  • Loc: Goodyear, AZ

Posted 05 February 2013 - 01:23 PM

Suresh,

Excellent job on the image. I have looked at this scope as an option for my AP900, but I have to admit I would have been skeptical about putting it on a Mach 1. Looking forward to seeing more images from this combination.

Mike

#5 Suresh

Suresh

    Mariner 2

  • -----
  • Posts: 235
  • Joined: 05 Aug 2005
  • Loc: South India

Posted 05 February 2013 - 10:27 PM

Thanks Mike I'm enjoying the shorter duration required with z
ASA reducer .

#6 rainycityastro

rainycityastro

    Viking 1

  • *****
  • Posts: 718
  • Joined: 29 Mar 2010
  • Loc: Seattle, WA

Posted 06 February 2013 - 02:01 AM

Thats a great result Suresh!
Its very impressive that the mach1 was able to carry a 12" newtonian!

#7 Suresh

Suresh

    Mariner 2

  • -----
  • Posts: 235
  • Joined: 05 Aug 2005
  • Loc: South India

Posted 06 February 2013 - 05:42 AM

Thanks; Rolando pointed out that it would carry with ease , I've just pulled the trigger on the TAK baby FSQ -) just waiting for it






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics