Go Back   IceInSpace > Images > Deep Space

Reply
 
Thread Tools Rate Thread
  #1  
Old 15-02-2011, 04:31 PM
alexch's Avatar
alexch (Alex)
Registered User

alexch is offline
 
Join Date: Dec 2008
Location: Melbourne
Posts: 773
A few images taken with SDM Dob

Hi All,

The Weather Gods were a bit more accommodating this Saturday and sent some patches between the clouds. I've got all the adaptors and couldn't wait to try more imaging with my 22" f/3.6 SDM Dob and Sony NEX-5 mirrorless camera with Paracorr Type II.

I intended to do dark frames in the fridge at home, however it seems that Adobe Camera Raw in Photoshop CS5 deals with hot pixels quite efficiently. Also the Servocat Alt-Az motors want to correct the pointing every now and again and limit the exposure time to no more than 15 seconds.

Full-size images and equipment shots are here:
http://www.terrastro.com/galleries/deep-space-hr/

Low-res images are attached below.

I have a lot to see visually yet so I am doing the imaging just for fun without much skill involved and have no intention to get into EQ platforms or expensive field de-rotators. (Please remind me about that frequently...)

Thanks for looking.
Alex

Omega Centauri (NGC 5139): 3 x 10sec, ISO 3200
Jewel Box (NGC 4755): 3 x 15sec, ISO 3200
Centaurus A (NGC 5128): 17 x 15sec, ISO 3200
Keyhole Nebula (in NGC 3372): 8 x 15sec, ISO 3200
Orion Nebula (NGC 1976): 9 x 8sec, ISO 3200

Processed in DeepSkyStacker and Photoshop CS5
Attached Thumbnails
Click for full-size image (Omega Centauri (NGC 5139).jpg)
196.5 KB697 views
Click for full-size image (Jewel Box (NGC 4755).jpg)
194.2 KB583 views
Click for full-size image (Centaurus A (NGC 5128).jpg)
179.5 KB930 views
Click for full-size image (Keyhole Nebula (part of NGC 3372).jpg)
193.5 KB754 views
Click for full-size image (Orion Nebula (NGC 1976).jpg)
110.9 KB858 views

Last edited by alexch; 15-02-2011 at 04:47 PM.
Reply With Quote
  #2  
Old 15-02-2011, 04:45 PM
TrevorW
Registered User

TrevorW is offline
 
Join Date: Aug 2006
Location: Western Australia
Posts: 7,349
I wouldn't complain about those well done Alex (the astroholic)
Reply With Quote
  #3  
Old 15-02-2011, 04:46 PM
asimov's Avatar
asimov (John)
Planet photographer

asimov is offline
 
Join Date: May 2005
Location: Bundaberg
Posts: 8,819
That is seriously nice work! Well done.
Reply With Quote
  #4  
Old 15-02-2011, 05:00 PM
[1ponders]'s Avatar
[1ponders] (Paul)
Retired, damn no pension

[1ponders] is offline
 
Join Date: Nov 2004
Location: Obi Obi, Qld
Posts: 18,778
Geez Louise!!! They are Great Alex! What's this NEX-5 camera you talk about???

That Centaurus A shot has some awesome detail in it.






Edit: Just checked out the camera. Your kidding right??? Look out canon!
Reply With Quote
  #5  
Old 15-02-2011, 05:04 PM
mill's Avatar
mill (Martin)
sword collector

mill is offline
 
Join Date: Oct 2006
Location: Mount Evelyn
Posts: 2,922
Yep that Centaurus shot is very good
The rest too
Reply With Quote
  #6  
Old 15-02-2011, 05:21 PM
dugnsuz's Avatar
dugnsuz (Doug)
to baldly go...

dugnsuz is offline
 
Join Date: Aug 2005
Location: Hahndorf, South Australia
Posts: 4,201
Great images for such short exposures - aperture rules in this instance.
Cheers
Doug
Reply With Quote
  #7  
Old 15-02-2011, 05:21 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 21,182
That's awesome. Aperture rules indeed.
Reply With Quote
  #8  
Old 15-02-2011, 05:26 PM
renormalised's Avatar
renormalised (Carl)
No More Infinities

renormalised is offline
 
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Geez, Alex!!! Everyone else has to shoot for hours to get shots like that and with uber gear to boot. You do it with a dob, servocat and a few short subs!!!!

Must be in the wrist

Maybe I'm not poking my tongue at the right angle

Maybe I don't have 22" of mirror
Reply With Quote
  #9  
Old 15-02-2011, 05:37 PM
renormalised's Avatar
renormalised (Carl)
No More Infinities

renormalised is offline
 
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Just checked out the cameras too....not bad

Not too dear either!!!
Reply With Quote
  #10  
Old 15-02-2011, 05:43 PM
alexch's Avatar
alexch (Alex)
Registered User

alexch is offline
 
Join Date: Dec 2008
Location: Melbourne
Posts: 773
Trevor, John, Paul, Martin, Doug, Marc, Carl - thanks heaps for the encouraging comments, much appreciated!
Reply With Quote
  #11  
Old 15-02-2011, 05:50 PM
alexch's Avatar
alexch (Alex)
Registered User

alexch is offline
 
Join Date: Dec 2008
Location: Melbourne
Posts: 773
Quote:
Originally Posted by renormalised View Post
Just checked out the cameras too....not bad

Not too dear either!!!
Yes I love this little camera for family photos, it is as capable as any DSLR with an APS-C sized chip but much lighter and easier to carry. Not very expensive too.

Working with the live view only and a quirky UI was frustrating for the first few days but then I got used to it. The tilting display is great for waist level shooting.

The only problem I anticipate with it for real astro-work is that live view cannot be turned off (it has no viewfinder). I tend to switch the camera off when not taking images in order not to heat up the chip. Also Sony NEX series are quite prone to getting very warm.

In the image attached below I have NEX-Nikon adapter (Photodiox, $50), Nikon T-Adapter, Televue 2.4" T Ring adapter, Televue Paracorr Type II coma corrector.

Cheers,
Alex
Attached Thumbnails
Click for full-size image (Sony NEX5.jpg)
121.0 KB183 views

Last edited by alexch; 15-02-2011 at 06:39 PM.
Reply With Quote
  #12  
Old 15-02-2011, 06:44 PM
renormalised's Avatar
renormalised (Carl)
No More Infinities

renormalised is offline
 
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Is it just the live view heating everything up or does the camera as a whole heat up??
Reply With Quote
  #13  
Old 15-02-2011, 06:51 PM
alexch's Avatar
alexch (Alex)
Registered User

alexch is offline
 
Join Date: Dec 2008
Location: Melbourne
Posts: 773
Quote:
Originally Posted by renormalised View Post
Is it just the live view heating everything up or does the camera as a whole heat up??
I haven't done extensive testing when imaging through the Dob so not sure. However after 20 minutes of constant live view or video recording the camera feels warm in the hand.
Edit: I mean the whole camera is warm.
Reply With Quote
  #14  
Old 15-02-2011, 06:55 PM
renormalised's Avatar
renormalised (Carl)
No More Infinities

renormalised is offline
 
Join Date: Apr 2008
Location: Townsville
Posts: 9,698
Given that you're only shooting such short subs and getting these sort of results, I don't think you'll be having to worry about heating of the camera.

Helps to have a light bucket, though
Reply With Quote
  #15  
Old 15-02-2011, 06:55 PM
mswhin63's Avatar
mswhin63 (Malcolm)
Registered User

mswhin63 is offline
 
Join Date: May 2009
Location: Para Hills, South Australia
Posts: 3,574
Damn they are really well done. Aperture rules alright
Reply With Quote
  #16  
Old 15-02-2011, 07:13 PM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 32,353
OMG in only a few seconds.............oh man................
Reply With Quote
  #17  
Old 15-02-2011, 07:29 PM
desler's Avatar
desler
Registered User

desler is offline
 
Join Date: Jan 2008
Location: Werribee, Australia
Posts: 1,053
By the look of those images Alex, you've done incredibly well.

Wonder if we are about to see another aperture rules uptake!

Darren
Reply With Quote
  #18  
Old 15-02-2011, 07:34 PM
jjjnettie's Avatar
jjjnettie (Jeanette)
Registered User

jjjnettie is offline
 
Join Date: Feb 2005
Location: Monto
Posts: 16,738
LOL You've left everyone with their jaws on the ground with those pics.
Fantastic work!
Reply With Quote
  #19  
Old 15-02-2011, 07:41 PM
DavidU's Avatar
DavidU (Dave)
Like to learn

DavidU is offline
 
Join Date: Jul 2007
Location: melbourne
Posts: 4,834
How awesome is that ! Neat little camera too. I'm sure some one will come up with a switch to turn off the LCD display that I'm sure is where the heat is coming from.
Reply With Quote
  #20  
Old 15-02-2011, 08:19 PM
Screwdriverone's Avatar
Screwdriverone (Chris)
I have detailed files....

Screwdriverone is offline
 
Join Date: Feb 2008
Location: Kellyville Ridge, NSW Australia
Posts: 3,306
Holy Moly!

Who needs EQ platforms and hours of exposures when a handful will do?

Cant wait to see what you get when you arent "doing the imaging just for fun" !!!!

Innovation award me thinks! Doesn't Mr Malin have a category for such a thing?

Damn these are good Alex!

Cheers

Chris
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:52 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
NexDome Observatories
Advertisement
Limpet Controller
Advertisement
Testar
Advertisement
Astronomy and Electronics Centre
Advertisement