Page 1 of 3 123 LastLast
Results 1 to 10 of 28
  1. #1
    blaise's Avatar
    blaise is offline Bright Giants
    Points: 16,059, Level: 87
    Level completed: 46%, Points required for next Level: 191
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!100+ Threads Achievement!
    Join Date
    Oct 2009
    Location
    SC
    Posts
    597
    Points
    16,059
    Level
    87
    Thanks
    80
    Thanked 248x 146 Posts

    Default Please Try my Data



    Below is an example of a problem I am experiencing...

    Took a number of 2 minute exposures last night of M13. I am having issues with darks and flats for some reason. This is a new problem that I haven't had recently, but that's something I will have to go back and reflect upon.

    My issue with this particular one is that as I use levels to really bring out the structure, the stars begin to look fake and the color becomes unrealistic. I am using the same methods I use for everything else, except I am not achieving the same results. I don't know why.

    If any of you wouldn't mind having a go at this one, I would appreciate it. If you decide to, please detail your methods so that I can try it.


    MEGAUPLOAD - The leading online storage and file delivery service
    Thank you

    Megaupload link:
    AT6RC, AT72ED, Orion ST80 (guide scope), Celestron 8, SW254N, Canon 450D, Meade DSI (guide cam), Celestron CGEM DX

  2. The Following 2 Users Say Thank You to blaise For This Useful Post:

    admin (07-09-2010),EricFD (07-09-2010)

  3. #2
    seal killer's Avatar
    seal killer is offline SUPER GIANT
    Points: 14,850, Level: 83
    Level completed: 50%, Points required for next Level: 350
    Overall activity: 0%
    Join Date
    Apr 2010
    Location
    Kansas City
    Posts
    694
    Points
    14,850
    Level
    83
    Thanks
    1
    Thanked 276x 153 Posts

    Default

    blaise--

    I learn a lot each time I do this. Thanks!

    Having not seen your effort, I do not know whether mine is better. Please let me know.

    Plus, I have run across a post on CN which has a reply that is EXACTLY what you are looking for. (I think.) Here is the original request for help with its replies on CN (which includes the detailed method link by "Alex") . . .

    Telescope Reviews: ?'s about keeping stars small and colorful

    And here is the direct link to Alex's Stargazer Lounge detailed reply which I find pertinent . . .

    5) Creating a star layer - Stargazers Lounge

    The procedure above is detailed by "Alex" in what? Photoshop? I don't know! I am studying it now to understand the concepts so I can translate it to something I've got. Hopefully, it is PS and you have it!

    In the meantime, let me know what you think about my version of your great image!

    --Bill
    Attached Images Attached Images
    Nikon D700

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Atlas EQ-G; Orion ST80 and SSAG
    Astro-Tech 8" f/4 Imaging Newtonian, Meade DS-10
    ImagesPlus Camera Control v3.83a, ImagesPlus Processing 4.0
    iPhone: 39d 10m 11s N, 94d 52m 13s W
    <a href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    data-link-preview="0_astrophotography" class="vw-link vw-link-previewable vw-link-auto" href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    title="Astrophotography">Astrophotography/Astrophotography.htm">seal killer's Astrophotography</a>

  4. The Following 2 Users Say Thank You to seal killer For This Useful Post:

    admin (07-08-2010),EricFD (07-09-2010)

  5. #3
    Fuzz's Avatar
    Fuzz is offline Bright Giants
    Points: 11,818, Level: 75
    Level completed: 23%, Points required for next Level: 232
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!
    Join Date
    Apr 2009
    Location
    Silverthorne, CO
    Posts
    469
    Points
    11,818
    Level
    75
    Thanks
    68
    Thanked 450x 165 Posts

    Default

    Here's my edit:



    Edits:
    1. Levels adjustment for white point to ensure center of brightest star shows 255,255,255
    2. Levels adjustments for black point to ensure darkest space shows ~20,20,20
    3. Curves adjustment to lighten midpoint (move midpoint of curve up)
    4. Levels adjustment to move gray point left (to lighten) and black point right (to darken)
    5. Curves adjustment to darken background while maintaining midtones & highlights
    6. Increased color saturation
    7. Selected yellow colored stars and increased color saturation
    8. Levels adjustment to darken background without losing midtones or highlights
    9. High pass sharpen (copy layer, run High Pass filter, change blending mode to Overlay, merge layers)


    Except for the first two steps, the extent of all the other adjustments were gauged visually.
    Visual:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    8SE
    Imaging: Astro-Tech AT6RC,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    EQ-G mount,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    autoguider, Canon 40D
    Location: Colorado Rockies

  6. The Following 4 Users Say Thank You to Fuzz For This Useful Post:

    admin (07-08-2010),alsetalokin (07-11-2010),corpusse (07-08-2010),EricFD (07-09-2010)

  7. #4
    admin's Avatar
    admin is offline Administrator
    Points: 6,989,798, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 5.0%
    Achievements:
    First 1000 Experience PointsGot three Friends20+ Friends Achievement!5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Mar 2007
    Location
    Sydney, Australia
    Posts
    13,479
    Points
    6,989,798
    Level
    100
    Thanks
    18,563
    Thanked 7,915x 3,807 Posts
    Blog Entries
    2

    Default

    i will try as well as soon as i get some time great stuff so far!
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    |
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    | My Astronomy Blog

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


  8. #5
    seal killer's Avatar
    seal killer is offline SUPER GIANT
    Points: 14,850, Level: 83
    Level completed: 50%, Points required for next Level: 350
    Overall activity: 0%
    Join Date
    Apr 2010
    Location
    Kansas City
    Posts
    694
    Points
    14,850
    Level
    83
    Thanks
    1
    Thanked 276x 153 Posts

    Default

    blaise and Fuzz and Gus--

    I screwed the assignment up by not showing the detail of WHAT I did. I am going to reprocess it and pay attention to exactly what steps I took and post them. (They are recorded by ImagesPlus for posterity, but not long-term by NX2.)

    It looks like Fuzz's image is better. The colors are certainly better. I will see if I can get close to it.

    Thanks, Fuzz!

    --Bill
    Nikon D700

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Atlas EQ-G; Orion ST80 and SSAG
    Astro-Tech 8" f/4 Imaging Newtonian, Meade DS-10
    ImagesPlus Camera Control v3.83a, ImagesPlus Processing 4.0
    iPhone: 39d 10m 11s N, 94d 52m 13s W
    <a href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    data-link-preview="0_astrophotography" class="vw-link vw-link-previewable vw-link-auto" href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    title="Astrophotography">Astrophotography/Astrophotography.htm">seal killer's Astrophotography</a>

  9. #6
    seal killer's Avatar
    seal killer is offline SUPER GIANT
    Points: 14,850, Level: 83
    Level completed: 50%, Points required for next Level: 350
    Overall activity: 0%
    Join Date
    Apr 2010
    Location
    Kansas City
    Posts
    694
    Points
    14,850
    Level
    83
    Thanks
    1
    Thanked 276x 153 Posts

    Default

    blaise and Fuzz and All--

    I could not improve my original pass very much. I managed to get the white point and black point set correctly (easy). The rest was pretty much adjusted by eye in an attempt to get the image product to look like Fuzz's.

    I either cannot do it at this time or lack the tools. I don't know how to protect the yellow stars, get the green out or perform the high pass sharpen. (I guess it is something different than a simple unsharp mask?)

    It was very good practice.

    --Bill
    Attached Images Attached Images
    Nikon D700

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Atlas EQ-G; Orion ST80 and SSAG
    Astro-Tech 8" f/4 Imaging Newtonian, Meade DS-10
    ImagesPlus Camera Control v3.83a, ImagesPlus Processing 4.0
    iPhone: 39d 10m 11s N, 94d 52m 13s W
    <a href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    data-link-preview="0_astrophotography" class="vw-link vw-link-previewable vw-link-auto" href="
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    title="Astrophotography">Astrophotography/Astrophotography.htm">seal killer's Astrophotography</a>

  10. #7
    blaise's Avatar
    blaise is offline Bright Giants
    Points: 16,059, Level: 87
    Level completed: 46%, Points required for next Level: 191
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!100+ Threads Achievement!
    Join Date
    Oct 2009
    Location
    SC
    Posts
    597
    Points
    16,059
    Level
    87
    Thanks
    80
    Thanked 248x 146 Posts

    Default

    Bill and Fuzz:

    I have only casually glanced at the replies (gotta run), but I can tell that much of my problem exist within the realm of processing.

    Great job guys.

    Fuzz, thank you so much for outlining the information. When I get back on I will print and try it out. I hope at some point I can return the favor in some way.

    Thanks guys!
    AT6RC, AT72ED, Orion ST80 (guide scope), Celestron 8, SW254N, Canon 450D, Meade DSI (guide cam), Celestron CGEM DX

  11. #8
    corpusse's Avatar
    corpusse is offline HYPER GIANT
    Points: 44,301, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Join Date
    Nov 2009
    Location
    Mississauga, Ontario / St. Joesph Island, ON
    Posts
    1,765
    Points
    44,301
    Level
    100
    Thanks
    56
    Thanked 1,484x 635 Posts

    Default

    Fuzz, this helps a lot, I'm trying your steps in my own image of another glob (m3).

    blaise for some reason photoshop is not opening your file.
    White Zone home planetary / solar observatory :
    Celestron CGE, Celestron C11
    ZWO Astronomy Camera ASI120MM, Point Grey Research Chameleon mono cam
    Grey Zone wbobservatory.com - future remote observatory
    Celestron CGEM
    Astro-Tech 6" Ritchey-Chrétien , Astro-Tech AT66ED
    QHY8 OSC CCD,Canon Rebel Ti3 - unmodified as of yet

  12. #9
    blaise's Avatar
    blaise is offline Bright Giants
    Points: 16,059, Level: 87
    Level completed: 46%, Points required for next Level: 191
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!100+ Threads Achievement!
    Join Date
    Oct 2009
    Location
    SC
    Posts
    597
    Points
    16,059
    Level
    87
    Thanks
    80
    Thanked 248x 146 Posts

    Default

    Could it be because it's a fits file? I thought PS had difficuty with those unless you download a fits plugin (fits liberator)?

    Here's what I got this morning before I posted this. This is the image that complelled me to post the initial question. There is so much data here, but as I mentioned earlier, it looks cartoonish.
    Attached Images Attached Images
    AT6RC, AT72ED, Orion ST80 (guide scope), Celestron 8, SW254N, Canon 450D, Meade DSI (guide cam), Celestron CGEM DX

  13. #10
    Fuzz's Avatar
    Fuzz is offline Bright Giants
    Points: 11,818, Level: 75
    Level completed: 23%, Points required for next Level: 232
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!
    Join Date
    Apr 2009
    Location
    Silverthorne, CO
    Posts
    469
    Points
    11,818
    Level
    75
    Thanks
    68
    Thanked 450x 165 Posts

    Default

    Quote Originally Posted by blaise View Post
    This is the image that complelled me to post the initial question. There is so much data here, but as I mentioned earlier, it looks cartoonish.
    The trick with processing astro-images is to be subtle. Normal daylight images can take a lot of big levels and curves adjustments. Not so with astrophotography. You have to make small adjustments. When I process (being a rank beginner), I choose a few parts of the image to keep my eye on -- with every adjustment, I look at the before/after versions of each area to make sure I'm not "ruining" any portion. That's why my processing has so many adjustments -- because a lot of them are very small.
    Visual:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    8SE
    Imaging: Astro-Tech AT6RC,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    EQ-G mount,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    autoguider, Canon 40D
    Location: Colorado Rockies

 

 
Page 1 of 3 123 LastLast

Similar Threads

  1. Looking for data...
    By Marchimedes in forum Astronomy Beginners Forum
    Replies: 0
    Last Post: 10-18-2010, 09:03 PM
  2. Want to try my m31 data?
    By corpusse in forum Astrophotography Image Processing Forum
    Replies: 23
    Last Post: 07-11-2010, 06:16 AM
  3. No Data from Spirit...???
    By Elysium Fossa in forum UK Astronomy Forum
    Replies: 0
    Last Post: 01-22-2004, 10:30 AM
  4. where to get obeservation data?
    By Llanzlan Klazmon The 15th in forum General Astronomy Forum
    Replies: 0
    Last Post: 07-29-2003, 04:39 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 04:30 PM.