K-Tec

First real attempt at Deep sky imaging

More
19 years 10 months ago #4207 by dave_lillis
Replied by dave_lillis on topic Re: First real attempt at Deep sky imaging
Thanks,
I went back and re-did the image, and there it was, a very faint blip where IC1296 should be.

www.irishastronomy.org/user_resources/fi...03336-m57_ic1296.jpg
Again, turn your monitor brightness and contrast up full for this.

Its rated magnitude is 15.1 with a diameter of 1.1 arcminutes, keep in mind thast magnitudes in galaxies dont always reflect their surface brightness.
This is more about detecting it at all, other then seeing it clearly, for now :wink:

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

Please Log in or Create an account to join the conversation.

More
19 years 10 months ago #4211 by larrylart
Replied by larrylart on topic Re: First real attempt at Deep sky imaging
Great shot Dave! I did a test shot last Tuesday night at m57 and I think 1 minute exposures at 1600 iso might be worth to try. You need to have an equatorial mount else field rotation won’t allow. With a bit of luck tonight I might have a go at this nebula myself :)


Larry
___
larryo.org

_______
larryo.org

Please Log in or Create an account to join the conversation.

  • michaeloconnell
  • Topic Author
  • Offline
  • Administrator
  • Administrator
More
19 years 10 months ago #4214 by michaeloconnell
Replied by michaeloconnell on topic Re: First real attempt at Deep sky imaging
Super shot Dave!
It is indeed amazing what can be captured by the 300d.
I see you tok 24 frames. Were they 30sec exposures you used?
How did registax cope with the images? Did you need to reduce the file size first?

Michael

Please Log in or Create an account to join the conversation.

More
19 years 10 months ago #4215 by larrylart
Replied by larrylart on topic Re: First real attempt at Deep sky imaging
Registax 2 has no problem. I usually stack 3072x 2048 fine jpegs and I did stacks sometime as many as 180 frames. Even when you stack raw images converted in bmp went smooth. You want to have a s much ram as possible – I have 512Megs on my laptop and is just enough.

Larry

_______
larryo.org

Please Log in or Create an account to join the conversation.

More
19 years 10 months ago #4216 by voyager
Replied by voyager on topic Re: First real attempt at Deep sky imaging
Hmmm .... I thought I had noticed IC1296 on images of M57 I had taken during VTIE sessions so I dug up the images I took of M57 with the 14" Telescopes In Education telescope on Mount Wilson.

This is a 2 minute exposure of M57 processed to show the nebula clearly. If oy look really carefully you can just about see the galaxy:



However, today I re-processed the raw fits in an attempt to bring out the galaxy. This resulted in the nebula getting horribly over lit but I was really pleased to find the structure of the galaxy clearly visible!

Have a look:


My Home Page - www.bartbusschots.ie

Please Log in or Create an account to join the conversation.

More
19 years 10 months ago #4218 by dave_lillis
Replied by dave_lillis on topic Re: First real attempt at Deep sky imaging
Thats a great image of tha galaxy, something to aim for.
Can you remember the exposure time ??
All I need is a 14 inch scope and the seeing on mount Wilson :wink:

I used 30 second exposures at iso1600,
I might try longer exposuresd at lower iso ratings to see if it prodices less noise.
Once i get the polar allignment fully sorted (wont bother until the dome in built) I'll try it with ds/o2 filters at much longer exposures.
I used the low image quality on fine detail mode, registax seemed to be ok with them, I wish I'd taken more shots, imagine what 100+ stacked images could produce.

I actually tried 1 and 2 minutre exposures but the missaligned mount and light pollutiuon for the 2 min exposure didnt help..

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

Please Log in or Create an account to join the conversation.

Time to create page: 0.115 seconds
Powered by Kunena Forum