50mm f1.4 DoF "Double Vision"?

Discussion in 'Beyond the Basics' started by LittleMan, Feb 12, 2007.

  1. LittleMan

    LittleMan TPF Noob!

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    If I take a photo with a lot of DoF with my 50mm lens it looks as if it is "seeing double"(slightly) in the background where it is blurred.
    It isn't too noticeable unless you look really hard... but it's still there...
    Is this normal? Or is there something wrong with my lens?
     
  2. Patrice

    Patrice No longer a newbie, moving up!

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    I'll have a look at some of the images from my 85 1.4 and see if something similar happens.
     
  3. Big Mike

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

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    With 'a lot of DOF'...(small aperture) or with a small DOF (Large aperture)?

    Can we see an example?
     
  4. LittleMan

    LittleMan TPF Noob!

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    ok, I just went outside and took a quick shot for an example.
    (it was really hazy outside... forgive the haziness on the flag)

    [​IMG]

    Notice the green fence pole in the background.
    Maybe it's a little hard to see, but if you look it is like it's double vision. One on top of the other.
     
  5. LittleMan

    LittleMan TPF Noob!

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    Here is a different crop from the same photo... maybe it might be easier to see against the stop sign.

    [​IMG]
     
  6. LittleMan

    LittleMan TPF Noob!

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    Does anyone else see it??
    Or is it that I am just seeing double??? :crazy:
     
  7. shingfan

    shingfan TPF Noob!

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    i see what you mean.......

    a wild guess from a newbie ( ME ).....the pole is striaght....in order to blur a straight pole....what does the lense do?....double, overlay and blend :hail:
     
  8. Big Mike

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

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    I think what you are seeing is just...out of focus (bokeh).

    Some lenses give a more pleasing bokeh than others...maybe yours just isn't pleasing :scratch:
     
  9. Digital Matt

    Digital Matt alter ego: Analog Matt

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    The camera does not blur the image. The camera does not control what out of focus areas look like. This is a function of the lens. It is a result of the bokeh of the lens.
     
  10. Alex_B

    Alex_B No longer a newbie, moving up!

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    what brand lens is that? i have the Canon 50mm 1.4 and never realised anything like it.

    Might be just what Big Mike said, that you lens simply produces a less pleasant bokeh for that sort of scene.
     
  11. shingfan

    shingfan TPF Noob!

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    i guess i should be more specific when i type......i do mean lense...but when i type....i just use the word "camera" to represent everything that you attach to the camera all the time.......thx for pointing it out Matt.......i should call you "sensei" from now on :hail:.....you are very informative and knowledgable
     
  12. LittleMan

    LittleMan TPF Noob!

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    Same lens.

    I think I'm just seeing it because I want a new lens. :lmao:
     

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