Strange bokeh with Tamron 17-50mm f/2.8

Discussion in 'Photography Equipment & Products' started by wise, Dec 8, 2009.

  1. wise

    wise TPF Noob!

    Joined:
    Jul 25, 2008
    Messages:
    37
    Likes Received:
    0
    Location:
    Erfurt, Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    I just purchased the Tamron 17-50mm f/2.8. And I am pleased with the results so far, except for the bokeh which is kind of strange sometimes. You can see concentric circles in the out of focus highlights. I`ve tested the Tamron 28-75mm f/2.8 and didn`t have that problem. So here is my question: Is this kind of bokeh normal for that lens or did I just receive a bad copy?
     
  2. AUZambo

    AUZambo TPF Noob!

    Joined:
    Jan 14, 2007
    Messages:
    573
    Likes Received:
    6
    Location:
    Birmingham, AL, USA
    Can others edit my Photos:
    Photos OK to edit
    That's interesting...can you post a pic? I've got the same lens for my Sony A700. I haven't noticed anything weird about the bokeh, but I haven't really looked that hard either.

    It's easily my favorite lens of my small collection.
     
  3. wise

    wise TPF Noob!

    Joined:
    Jul 25, 2008
    Messages:
    37
    Likes Received:
    0
    Location:
    Erfurt, Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    Here`s an example:

    [​IMG]

    And a crop of the bokeh:

    [​IMG]
     
  4. benhasajeep

    benhasajeep TPF Noob!

    Joined:
    May 4, 2006
    Messages:
    2,101
    Likes Received:
    15
    Location:
    Eddington, ME
    That is lens flare that you are getting. Light is bouncing / reflecting from the direct light. Coatings help this but can't completely prevent it from happening.
     
  5. lamergod

    lamergod TPF Noob!

    Joined:
    Nov 27, 2009
    Messages:
    101
    Likes Received:
    1
    Location:
    Singapore
    it's not flare......... it's light,try using manual focus and out of focus at a area with lots of lights like at a traffic or something,the lights would become circle,it's called Hollywood style bokeh,can't be help
     
  6. benhasajeep

    benhasajeep TPF Noob!

    Joined:
    May 4, 2006
    Messages:
    2,101
    Likes Received:
    15
    Location:
    Eddington, ME
    Actually probably right. It's more reflected light bouncing in the lens. Can tell by the concentric circles in the ghost lights.
     
  7. wise

    wise TPF Noob!

    Joined:
    Jul 25, 2008
    Messages:
    37
    Likes Received:
    0
    Location:
    Erfurt, Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    @lamergod: The problem is not that the out of focus lights become a circle. Actually this is what I wanted. But these circles within circles are untypical and look strange to me.
     
  8. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,099
    Likes Received:
    3,765
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    It looks like the doughnut shaped bokeh one gets off highlights when using a mirror lens. Out of interest are you using a filter on that lens - if so have you tried removing it to see if that could be contributing to the problem?
     
  9. wise

    wise TPF Noob!

    Joined:
    Jul 25, 2008
    Messages:
    37
    Likes Received:
    0
    Location:
    Erfurt, Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    No, I don`t use a filter on that lens.
     
  10. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,822
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    I use that lens and I can't say that I've ever seen that before. But I don't have a lot of shots in that type of situation. :scratch:
     
  11. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    35,456
    Likes Received:
    12,796
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    Some people call that "bright line" bokeh. Others call it "onion" bokeh, due to the obvious,concentric circles it displays,and how it looks kind of like an onion slice, with you know, the rings...
     

Share This Page

Search tags for this page
17-50 tamron bokeh
,
17-50mm tamron bokeh
,
bokeh bad copy
,
bokeh tamron 17-50mm
,
onion bokeh
,
tamron 17 50 bokeh
,
tamron 17-50 2.8 bokeh
,

tamron 17-50 bokeh

,

tamron 17-50mm bokeh

,
tamron 17-50mm f/2.8 bokeh