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Thread: Bokeh vs. Shallow focal plane

  1. #1

    Default Bokeh vs. Shallow focal plane

    Hi

    Whats the difference between them? Kind of confused...

    Can anyone give examples if both?

    Thanks

  2. #2
    Moderator Octarine's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    Whats the difference between them? Kind of confused...
    Can anyone give examples if both?
    How much have you found already by searching the forum or using Google? What exactly is still unclear after reading all these websites?
    EOS

  3. #3
    Senior Member Numnumball's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    Hi

    Whats the difference between them? Kind of confused...

    Can anyone give examples if both?

    Thanks
    They are 2 totally diff things but inter-related, shallower (at fast apertures) focal plane (represents the area in a camera where light is focused) will derive better bokeh (out of focus areas)

    of cos there are other variables that we should bear in mind :-

    1. lens distance to subject
    2. focal length
    3. subject distance to background objects/subjects distance.

    Is this the kind of answer u r looking for?
    I turned PRO in diaper chg!
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  4. #4

    Default Re: Bokeh vs. Shallow focal plane

    i just seeing in this thread that a poster refers that a lot of users confused between bokeh and shallow dof...

    http://www.clubsnap.com/forums/showt...479460&page=32

    I also don't get it what he means by that. Just want to make things straight.





    All pics with shallow dof will have creamy bokeh, thats all i know.

  5. #5
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    shallow focal plane (????) or shallow depth of field?
    Exploring! :)

  6. #6
    Moderator Octarine's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    All pics with shallow dof will have creamy bokeh, thats all i know.
    Wrong.
    Shallow depth of field (DOF) is a physical effect due to sensor size, focal length and object distance. If you read up about the basics of DOF you will see these 3 parameters.
    Bokeh is a quality parameter, describing how pleasing the out of focus area is to the eye of the beholder. It is largely depending on the built of the lens (aperture blades, lens elements). Some lenses have a very pleasing bokeh, others don't - but having exactly the same DOF. In addition, no lens can turn an ugly and messy background into something pleasing and suitable for portrait. That's the photographer's job.
    Last edited by Octarine; 3rd June 2010 at 07:27 PM.
    EOS

  7. #7
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    i just seeing in this thread that a poster refers that a lot of users confused between bokeh and shallow dof...

    http://www.clubsnap.com/forums/showt...479460&page=32

    I also don't get it what he means by that. Just want to make things straight.

    All pics with shallow dof will have creamy bokeh, thats all i know.
    That's what happens when people who know 70% (but think they know 99%) start sharing their "knowledge" with others on a forum...
    Octarine has already corrected your myth about shallow dof = creamy bokeh
    Exploring! :)

  8. #8

    Default Re: Bokeh vs. Shallow focal plane

    Mmm, so when sharing bokeh thread, we should share shoots with "pleasing" background blur, instead of just having any simple blurred background?

  9. #9
    Moderator Octarine's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    Mmm, so when sharing bokeh thread, we should share shoots with "pleasing" background blur, instead of just having any simple blurred background?
    Be your first and sharpest critic. Does the blurred background really emphasize the object (which must be sharp then of course) or is it just a blur mess? There are nice examples here in CS where the background is simple, clear and nicely blurred. Other examples show a wild mix of colours, sometimes even brighter than the foreground, screaming for attention.
    Bokeh alone is not the point, it's a part of the overall picture composition.
    EOS

  10. #10

    Default Re: Bokeh vs. Shallow focal plane

    IIRC, bokeh CAN be calculated, or 'measured' since it is dependent on the laws of physics.

    What is difficult though, is transposing the calculations to an 'easy to understand/use chart' or 'reference' that various lens designers/manufacturers and end-user parties may agree on, because you're trying to translate hard maths into a set of visual values, which are usually very subjective.

    Warning! Trying to do the math may result in massive headaches!

  11. #11
    Moderator daredevil123's Avatar
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    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    All pics with shallow dof will have creamy bokeh, thats all i know.
    Some pics have shallow DoF, but the bokeh is not creamy leh, the bokeh is very harsh...

  12. #12

    Default Re: Bokeh vs. Shallow focal plane

    Quote Originally Posted by wah on View Post
    Mmm, so when sharing bokeh thread, we should share shoots with "pleasing" background blur, instead of just having any simple blurred background?
    Exactly. Otherwise it's just blurred background. If you read the wikipedia entry on Bokeh, you'll learn more about the types of bokeh, like ni-sen bokeh, etc.
    Alpha

  13. #13

    Default Re: Bokeh vs. Shallow focal plane

    TS can also look at http://www.rickdenney.com/bokeh_test.htm to see the difference between good bokeh and not-so-good bokeh between lenses at the similar subject distances, focal lengths and aperture values.
    5D Mk II | TS-E 17L | 17-40L | 24-105L IS | 35L | 85L | 70-200 f/2.8L IS | 100L Macro | 580EX II

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