Return to the Cloudy Nights Telescope Reviews home page


Astrophotography and Sketching >> CCD Imaging & Processing

Pages: 1 | 2 | (show all)
Mark72
professor emeritus


Reged: 09/19/12

Loc: Munich, Germany
M81 after 25 hours new
      #5526090 - 11/18/12 12:58 PM

Hi,

Just thought to got these elusive Arp's loops with tonnes of exposure but not much of them seen here.
I console myself that my FOV is too small to get them;)

LRGB - 880:190:160:240 minutes


http://www.astrobin.com/24889/B/



Thanks for looking!

Mark


Post Extras: Print Post   Remind Me!   Notify Moderator  
lordfabri
sage


Reged: 02/22/10

Loc: Turin , Italy
Re: M81 after 25 hours new [Re: Mark72]
      #5526099 - 11/18/12 01:02 PM

A LOT of exposure here..

Goot shot Mark!

Best Regards,

Fabrizio


Post Extras: Print Post   Remind Me!   Notify Moderator  
rigel123
Postmaster
*****

Reged: 06/29/09

Loc: SW Ohio
Re: M81 after 25 hours new [Re: Mark72]
      #5526110 - 11/18/12 01:06 PM

Beautiful!

Post Extras: Print Post   Remind Me!   Notify Moderator  
J.P.M
Post Laureate
*****

Reged: 11/14/06

Loc: 65"01'N25"47'E
Re: M81 after 25 hours new [Re: rigel123]
      #5526119 - 11/18/12 01:09 PM

I second to Warren, beautiful!

Post Extras: Print Post   Remind Me!   Notify Moderator  
broca
Carpal Tunnel
*****

Reged: 03/26/10

Loc: Ocala, FL
Re: M81 after 25 hours new [Re: J.P.M]
      #5526150 - 11/18/12 01:26 PM

I feel like I am there! Excellent work!

Post Extras: Print Post   Remind Me!   Notify Moderator  
SL63 AMG
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Williamson, Arizona
Re: M81 after 25 hours new [Re: broca]
      #5526287 - 11/18/12 02:54 PM

Mark, that's a great image. Lot's of color and detail.

Please take the next comment with a grain of salt as I am definitely not trying to minimize all of the hard work and effort you put into this spectacular image.

I think the stars are a bit "fat". It is particularly noticeable when viewing the smaller version, not the full resolution. With the diffraction spikes, it makes the larger stars look a little "square". On the full resolution version, it seems less noticeable.

I am wondering if perhaps you could mask the stars and then reintroduce them into the image as smaller stars without using image processing to reduce their size which may cause artificats to appear. The stars seem a bit bloated to me which I suppose could be due to the long exposure times, in which case only image processing can reduce them. Am I right on that?

Anyway, I know little about image processing so I am probably the last person you need advice from...lol.

Great job sir!

Edited by SL63 AMG (11/18/12 02:58 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mark72
professor emeritus


Reged: 09/19/12

Loc: Munich, Germany
Re: M81 after 25 hours new [Re: SL63 AMG]
      #5526297 - 11/18/12 03:00 PM

Thanks a lot guys!

Dave,

You are right! Fully agree. I feel the best way out are your stars - I'm so envious of your data;)
I 'll try to improve.


Mark


Post Extras: Print Post   Remind Me!   Notify Moderator  
blueman
Photon Catcher
*****

Reged: 07/20/07

Loc: California
Re: M81 after 25 hours new [Re: Mark72]
      #5526317 - 11/18/12 03:12 PM

Nice image, lots of data!
Blueman


Post Extras: Print Post   Remind Me!   Notify Moderator  
mcarroll
scholastic sledgehammer


Reged: 08/28/10

Loc: Greensboro, NC
Re: M81 after 25 hours new [Re: blueman]
      #5526398 - 11/18/12 04:11 PM

That's a very nice M81! You put a lot of time into it, so maybe you need darker skies to get Arp's loop to show up better.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Aircrftr
Pooh-Bah


Reged: 09/29/06

Loc: Claremore OK
Re: M81 after 25 hours new [Re: mcarroll]
      #5526527 - 11/18/12 05:50 PM

I have to agree with everyone else here. I think it looks great!

Post Extras: Print Post   Remind Me!   Notify Moderator  
tidroplane
Pooh-Bah
*****

Reged: 10/02/06

Loc: Everett, Wa. USA
Re: M81 after 25 hours new [Re: Aircrftr]
      #5526569 - 11/18/12 06:29 PM

Beautiful image, time well spent!

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mark72
professor emeritus


Reged: 09/19/12

Loc: Munich, Germany
Re: M81 after 25 hours new [Re: tidroplane]
      #5528205 - 11/19/12 03:32 PM

Thanks a lot guys!

Mark


Post Extras: Print Post   Remind Me!   Notify Moderator  
lunar
Carpal Tunnel


Reged: 07/03/10

Re: M81 after 25 hours new [Re: Mark72]
      #5528949 - 11/19/12 10:11 PM

Wow! You certainly did a good job here. Wonderful detail and color in the spiral arms and deepness of the field.

Post Extras: Print Post   Remind Me!   Notify Moderator  
SL63 AMG
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Williamson, Arizona
Re: M81 after 25 hours new [Re: Mark72]
      #5529225 - 11/20/12 12:36 AM

Quote:

Dave,

You are right! Fully agree. I feel the best way out are your stars - I'm so envious of your data;)
I 'll try to improve.


Mark




Your data is fine and your image is fantastic. I just gave my initial impression of how the stars appeared in the small image.

I think if you can figure out how to get the color into the stars rather than in a halo around the star, the stars would look cleaner.

Anyway, my comment was definitely not meant to berate you or your hard work and tremendous effort. After reading it again, it comes across that way.

Instead, it was meant as a freindly opinion that I hoped would make your already fabulous image even better.

I dont' like typing my comments. It's hard to convey constructive criticism without coming across like a jerk.

Please accept my apology.

Your friend,

Dave


Post Extras: Print Post   Remind Me!   Notify Moderator  
jsigone
scholastic sledgehammer
*****

Reged: 12/27/08

Loc: Escondido--> San Diego, CA
Re: M81 after 25 hours new [Re: SL63 AMG]
      #5529276 - 11/20/12 01:26 AM

sweet work on that target

Post Extras: Print Post   Remind Me!   Notify Moderator  
scirocco1
member


Reged: 05/05/09

Loc: Cluj,Romania
Re: M81 after 25 hours [Re: jsigone]
      #5529294 - 11/20/12 01:49 AM

Great details, I specially like the background, noise free and lots of faint stuff visible. I think hard stretching should reveal the elusive loop.

Post Extras: Print Post   Remind Me!   Notify Moderator  
kfir Simon
Vendor-PowerNewt


Reged: 09/21/10

Re: M81 after 25 hours new [Re: scirocco1]
      #5529404 - 11/20/12 05:35 AM

WOW - that is a great image!
I envy your patience...to dedicate 25 HRS in just one object!!??
But the effort really pays off.

Cheers,

Kfir


Post Extras: Print Post   Remind Me!   Notify Moderator  
bill w
Postmaster
*****

Reged: 03/26/05

Loc: southern california
Re: M81 after 25 hours new [Re: kfir Simon]
      #5530165 - 11/20/12 01:25 PM

nice job warren

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mark72
professor emeritus


Reged: 09/19/12

Loc: Munich, Germany
Re: M81 after 25 hours new [Re: bill w]
      #5530468 - 11/20/12 03:43 PM

Thanks guys!

Dave,

No problem at all, thanks for pointing this out.
Perfectly valid comment.

Mark


Post Extras: Print Post   Remind Me!   Notify Moderator  
w orchid
Pooh-Bah


Reged: 04/23/07

Loc: Tampa, Fl
Re: M81 after 25 hours new [Re: Mark72]
      #5530602 - 11/20/12 04:43 PM

Fantastic image of M81.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
11 registered and 17 anonymous users are browsing this forum.

Moderator:  Oldfield, Scott in NC, bilgebay, WOBentley 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1304

Jump to

CN Forums Home




Cloudy Nights Sponsor: Astronomics