Thread: Weird color fringing/blooming Sigma 18-35?

Results 1 to 7 of 7
  1. #1 Weird color fringing/blooming Sigma 18-35? 
    Was wondering if anyone can tell me what's going on here. I'll get a blooming effect often with a blueish tint and I'm trying to figure out the cause. I believe its the lens, but I don't know what or why it's occuring. Is this a common problem with the Sigma 18-35 or have I just got a dud?



    fringing_1.7.1.jpg

    Here is a link to the DNG: https://www.dropbox.com/s/qibb0hac80...00831.dng?dl=0
    Last edited by RomanStone; 04-01-2019 at 08:09 PM.
    Reply With Quote  
     

  2. #2  
    Senior Member
    Join Date
    Oct 2016
    Posts
    441
    Are you using any filters? Wide open?
    Reply With Quote  
     

  3. #3  
    Senior Member
    Join Date
    Jul 2014
    Location
    Wollongong, NSW Australia
    Posts
    574
    What camera is it mounted on? Any adaptors? Or focal reducers?

    Are the optics clean? Is that flare?

    When you shone a bright light (torch) through the lens, are the optics clear?

    BTW, if ever you'll see colour fringing on a lens, it'll be with that particular lighting condition - a dark subject over a bright, white background.
    Last edited by trispembo; 04-01-2019 at 11:40 PM.
    Reply With Quote  
     

  4. #4  
    IR CUT Filter and an ND Filter. I believe this wasn't wide open. Mounted on a UM 4.6k and using a Nikon to EF adapter. After reading your posts, I'll have to try out the scenarios you guys laid out to try and narrow down the culprit.
    Reply With Quote  
     

  5. #5  
    Senior Member
    Join Date
    Oct 2016
    Posts
    441
    It looks like flare to me, personally. A matte box or lens hood helps. I would never shoot outside without one. People have also been known to use gaff tape or paper and rig a makeshift one if need be.
    Reply With Quote  
     

  6. #6  
    Senior Member
    Join Date
    Jul 2014
    Location
    Wollongong, NSW Australia
    Posts
    574
    Quote Originally Posted by RomanStone View Post
    IR CUT Filter and an ND Filter. I believe this wasn't wide open.
    When using filtration, you're even more likely to encounter flare or other strange artefacts. As Geran mentioned, try to use matte box, lens hood or something to protect filters/front element from stray light hitting it.
    Reply With Quote  
     

  7. #7  
    Senior Member jambredz's Avatar
    Join Date
    Apr 2012
    Location
    Kingston, Jamaica
    Posts
    4,377
    yeh looks like a veiling flare. Mattebox or dinkum lens shade https://www.bhphotovideo.com/c/produ...m_Compact.html
    Darren Scott
    Freelance Director/Director of Photography


    https://vimeo.com/jambredzvisions/videos
    Reply With Quote  
     

Similar Threads

  1. Weird Color Difference On Color Match Attempt?
    By elevatevisuals in forum DaVinci Resolve
    Replies: 0
    Last Post: 10-06-2015, 04:39 PM
  2. Weird Color Artifacts in highlights
    By scorsesefan in forum General Discussion
    Replies: 22
    Last Post: 02-20-2014, 09:13 AM
  3. Blooming sensor update from BMD
    By stip in forum General Discussion
    Replies: 225
    Last Post: 09-25-2013, 03:35 PM
  4. Blooming issues and BM 4k
    By naavt in forum General Discussion
    Replies: 13
    Last Post: 09-08-2013, 09:05 AM
  5. Replies: 9
    Last Post: 09-02-2013, 08:55 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •