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Thread: What is the difference between out-of-focus and bokeh?

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    Default What is the difference between out-of-focus and bokeh?

    Greetings fellow clubsnappers,

    One of my favourite lens is the Canon EF 50mm f/1.8 Mk II. It is quite sharp and able to produce a blur background with a sharp subject. My question what is "out-of-focus" or OOF and what is Bokeh? What is the difference between the two, if any?

    Cheers

    Mahathir
    Last edited by mahathir; 31st August 2009 at 10:48 AM.
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    Senior Member Diavonex's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?


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    Senior Member Diavonex's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    Out-of-focus

    Refers to an image created when the rays of light passing through a lens fall upon a plane in front of or beyond the point at which they converge to form a sharp image. Out-of-focus images appear blurred or fuzzy.

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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by mahathir View Post
    Greetings fellow clubsnappers,

    One of my favourite lens is the Canon EF 50mm f/1.8 Mk II. It is quite sharp and able to produce a blur background with a sharp subject. My question what is "out-of-focus" or OOF and what is Bokeh? What is the difference between the two, if any?

    Cheers

    Mahathir
    Try THIS here...
    was it so hard?
    Nikon D90|Nikkor AF-S 16-85mm f/3.5-5.6G|SB400|Nikon 35mm f/1.8G
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    Senior Member ZerocoolAstra's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by mahathir View Post
    Greetings fellow clubsnappers,

    One of my favourite lens is the Canon EF 50mm f/1.8 Mk II. It is quite sharp and able to produce a blur background with a sharp subject. My question what is "out-of-focus" or OOF and what is Bokeh? What is the difference between the two, if any?

    Cheers

    Mahathir
    In summary,

    "Essentially, bokeh is an aesthetic and qualitative measure of light distortion in the out-of-focus areas of an image, and is primarily caused by lens aberrations and aperture shape."

    taken from the Wikipedia document.
    OOF just means that the object is not sharp. Bokeh is referring to how the "not sharp" object is rendered.
    My understanding of bokeh is that it cannot be quantified. People describe bokeh with terms such as "pleasing", or "smooth", or "creamy".
    Exploring! :)

  6. #6

    Default Re: What is the difference between out-of-focus and bokeh?

    bokeh is oof area lor..

    but bokeh more specific lor.. bokeh refers to the "quality of oof".. there is pleasing bokeh, and not so pleasing bokeh. bokeh lovers usually based this on how "smooth or creamy" bokeh is.. this has to do with number of blades the lens has.

    to me, all look the same.. just don't too obiang can already. or maybe all my lenses all nice bokeh, don't know leh.

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    Moderator Octarine's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    More to read, take note of the term "Circle of Confusion" and the relation to Depth of Field and Bokeh.
    http://www.cambridgeincolour.com/tut...h-of-field.htm
    EOS

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    Default Re: What is the difference between out-of-focus and bokeh?

    Am I right both are due to imperfection of a lens, that is, failure to form image on the same plane?

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    Member deepanshus's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by LBL2009 View Post
    Am I right both are due to imperfection of a lens, that is, failure to form image on the same plane?
    i would rather put it as "imperfection" of physics such that all the light from all the planes can not be focussed at any given area, only one plane will be in focus...rest will not be hence the term "Out Of Focus"

    can you even care to read whats posted in other threads and "google" on this topic...
    Nikon D90|Nikkor AF-S 16-85mm f/3.5-5.6G|SB400|Nikon 35mm f/1.8G
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    Moderator nightwolf75's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    simple.

    out of focus - everything blur.
    bokeh - only background blur (technically not true.. but wat the heck)
    If Life worked on auto mode then manual mode for photography would have never existed. ― Deeksha Mittal

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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by nightwolf75 View Post
    simple.

    out of focus - everything blur.
    bokeh - only background blur (technically not true.. but wat the heck)
    bokeh also = blur...

    but simply said... probably some english teacher wanna say, 1 is adjective, 1 is noun, whichever... i'll say, both referring to different thing.

    OOF = a complete image, none of it is in focus, hence everything OOF, or in some case, focus on the wrong thing... like suppose to focus on eyes, go focus on teeth.

    bokeh = part of an image, aka the blurred off part. bokeh is just in another language for the meaning of 'blur'
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  12. #12

    Default Re: What is the difference between out-of-focus and bokeh?

    One is welcomed.

    The other is frowned upon (unless it's art).

  13. #13

    Default Re: What is the difference between out-of-focus and bokeh?

    Sorry to be out of topic.

    @Mahathir:
    In your sig, there's a 10-250mm EFS? I just know Canon has 10-250... or is it a typo. I dont even know Canon has 18-250...

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    Moderator Octarine's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by joker134 View Post
    Sorry to be out of topic.

    @Mahathir:
    In your sig, there's a 10-250mm EFS? I just know Canon has 10-250... or is it a typo. I dont even know Canon has 18-250...
    There is this thing called "private message".
    EOS

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    Default Re: What is the difference between out-of-focus and bokeh?

    OOF is when things are not in focus. Bokeh is the quality of the OOF effect.

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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by deepanshus View Post
    Try THIS here...
    was it so hard?
    funny thing is the 1st result of the search is this thread right here... so he kinda gets nowhere hahahah

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    Moderator Octarine's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by rgy1993 View Post
    funny thing is the 1st result of the search is this thread right here... so he kinda gets nowhere hahahah
    That's "blur" then
    EOS

  18. #18

    Default Re: What is the difference between out-of-focus and bokeh?

    Quote Originally Posted by Octarine View Post
    There is this thing called "private message".

  19. #19

    Default Re: What is the difference between out-of-focus and bokeh?

    Here's an explanation on what bokeh actually is:
    http://www.digicamhelp.com/taking-ph...hniques/bokeh/

    And a comparison between the Canon 50mm f1.4 and 50mm f1.8:
    http://photo.net/equipment/canon/ef50/

  20. #20
    Senior Member dennisc's Avatar
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    Default Re: What is the difference between out-of-focus and bokeh?

    I happened to take lotsa Bokeh Snapshots last weekend. Bokeh straight fr camera.

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