Results 1 to 4 of 4
Like Tree5Likes
  • 5 Post By eagle101st

Thread: Flat Frame Calibration Side by Side Comparison

  1. #1
    eagle101st's Avatar
    eagle101st is offline SUPER GIANT
    Points: 15,513, Level: 85
    Level completed: 90%, Points required for next Level: 37
    Overall activity: 2.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jun 2012
    Location
    Danville, CA
    Posts
    860
    Points
    15,513
    Level
    85
    Thanks
    51
    Thanked 381x 329 Posts
    Downloads
    0
    Uploads
    0

    Default Flat Frame Calibration Side by Side Comparison



    A couple weeks ago, I built a Flat Frame Light Box using an electroluminescent panel. A few people have asked that I post results of the flat frame calibration using the light box to take the flat frames. I finally got to test it out in the field when I shot M13 so here is a side by side comparison of an uncalibrated image vs. a flat frame calibrated image:

    FlatFrameCalibration.jpg

    I also wrote a small post about the topic on my website
    KathyNS, jaetea, ice and 2 others like this.
    - Michael

    Scopes:
    Takahashi Sky 90II (f/4.5; 408mm); Celestron C9.25 SCT (f/6.3; 1481)
    CCD: QSI 632 WSG-8 + Lodestar X2 + Astrodon 31mm Series E Gen 2 LRGB, 31mm 3nm Narrowband: Ha, SII, OIII
    Mount: Losmandy G11/Gemini 2 GoTo - http://EagleAstrophotography.com

  2. The Following 3 Users Say Thank You to eagle101st For This Useful Post:

    ice (06-10-2013),jaetea (06-10-2013),Skyhawk727 (06-10-2013)

  3. #2
    sxinias's Avatar
    sxinias is online now Super Moderator
    Points: 301,823, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 11.0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Awards:
    Attachments Award
    Join Date
    Nov 2008
    Location
    Marathon Greece summer Tampa Florida winter
    Posts
    17,458
    Points
    301,823
    Level
    100
    Thanks
    4,438
    Thanked 9,986x 6,361 Posts
    Blog Entries
    4
    Downloads
    3
    Uploads
    1

    Default Re: Flat Frame Calibration Side by Side Comparison

    Thanks for the photo showing the comparison.
    SXINIAS

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


    iOptron ZEQ25 mount; SkyWatcher SynScan AZ GOTO Mount;
    Orion ST-80A 80mm Refractor (OTA); Meade LX200 203mm SCT (OTA);
    Meade DS2090AT 90mm Refractor; Meade 2045LX3 102mm SCT;
    Celestron NexStar 4 SE 102mm MAK; Celestron Advanced Series C6S (XLT) 150mm SCT
    with an iOptron GOTO Drive

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

  4. #3
    camknox's Avatar
    camknox is offline SUPER GIANT
    Points: 11,269, Level: 73
    Level completed: 40%, Points required for next Level: 181
    Overall activity: 2.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!Gallery Achievement!
    Join Date
    May 2012
    Location
    Western Australia
    Posts
    1,030
    Points
    11,269
    Level
    73
    Thanks
    70
    Thanked 329x 292 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Flat Frame Calibration Side by Side Comparison

    That's really interesting. I've never used flats before. Now that I can image longer than 30 seconds it might be worth looking into.
    Cameron.

    Scopes:Celestron Fastar 8" OTA (Removed from NexStar 8SE), William Optics ZenithStar 71 Mount: iOptron IEQ45 GEM v2 FR's: Antares 6.3 Focal Reducer (SCT), William Optics 0.8 PFlat-6 (Refractor)
    EP's: Plössl 6mm, 8mm, 13mm, 17mm, 25mm, 32mm, 2x Barlow PSU: Celestron Powertank 17Ah
    Imaging: Canon EOS 650D (EOS Rebel T4i), Photoshop CS6 x64, DSS

  5. #4
    eagle101st's Avatar
    eagle101st is offline SUPER GIANT
    Points: 15,513, Level: 85
    Level completed: 90%, Points required for next Level: 37
    Overall activity: 2.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jun 2012
    Location
    Danville, CA
    Posts
    860
    Points
    15,513
    Level
    85
    Thanks
    51
    Thanked 381x 329 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Flat Frame Calibration Side by Side Comparison

    Quote Originally Posted by camknox View Post
    That's really interesting. I've never used flats before. Now that I can image longer than 30 seconds it might be worth looking into.
    If you are experiencing imperfections in your imaging and uneven fields (and/or vignetting) I would say yes go for it. I am not sure if DSLR's are as noisy as CCD's but the flats definitely help with the quality of my images.
    - Michael

    Scopes:
    Takahashi Sky 90II (f/4.5; 408mm); Celestron C9.25 SCT (f/6.3; 1481)
    CCD: QSI 632 WSG-8 + Lodestar X2 + Astrodon 31mm Series E Gen 2 LRGB, 31mm 3nm Narrowband: Ha, SII, OIII
    Mount: Losmandy G11/Gemini 2 GoTo - http://EagleAstrophotography.com

 

 

Similar Threads

  1. Balancing a GEM with a side by side saddle plate
    By astrovetteman in forum Telescope Mounts Forum
    Replies: 0
    Last Post: 02-10-2013, 04:15 PM
  2. ED80T CF First Light and side-by-side ST80
    By AlbertP in forum Telescope Forum
    Replies: 12
    Last Post: 11-03-2012, 03:27 PM
  3. Moon's Far-Side more rigid than Near-Side
    By Widdekind in forum Moon Forum
    Replies: 3
    Last Post: 09-21-2012, 01:02 AM
  4. For Sale: Losmandy Side by Side Mounting Plate
    By strg8zn1 in forum Astronomy Classifieds
    Replies: 1
    Last Post: 06-19-2012, 09:06 PM
  5. CG5-GT vs. CGEM side by side comparision
    By fogfire in forum Telescope Mounts Forum
    Replies: 13
    Last Post: 03-17-2012, 08:07 AM

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 10:17 AM.