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Thread: Bokeh Pic

  1. #21

    Default Re: Bokeh Pic

    thats an awesome cat ^^
    Check out my blog: pixelogist.me

  2. #22
    Senior Member NovJoe's Avatar
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    Default Re: Bokeh Pic

    I've took some comparison shots using my CZ 50/1.4 before and you can see the difference between f1.4 and f4 from the pictures below.

    50mm/1.4 @ f/1.4


    50mm/1.4 @ f/4

  3. #23
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    Default Re: Bokeh Pic

    Quote Originally Posted by tiger74 View Post
    Hi, is this the how to see the difference between bokeh and DoF?
    1st image: at 17mm F/2.8


    2nd image: at 50mm F/2.8 (+ few steps behind)
    Both image should be taken at same focal length, again you are going back to your 200mm idea. Read my suggestion again bro.

  4. #24
    Member Crappinni's Avatar
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    Default Re: Bokeh Pic

    Quote Originally Posted by tiger74 View Post
    I'm also newbie. My lens is 17-50mm F/2.8 Tamron.
    Is it true that I need a more zoom lens to produce a dramatic bokeh effect? Like a 200mm lens?
    Quote Originally Posted by Rashkae View Post
    No. If you're asking that, it means you haven't really used your lens that much yet.
    Hmmm maybe he's asking if a 200mm f/2.8 lens can give the "dramatic bokeh effect" better than say a 50mm f/2.8 lens (assuming everything else remains constant)? If that's the question than the answer is yes. As to why, refer to the f number formula.

  5. #25
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    Default Re: Bokeh Pic

    Yes, I guess the zoom level matters on the bokeh. The canon guide book compare it between 50mm vs 200mm and the blurred background is really different.

    Btw... I experiment with the DoF (is it?). I focus on "O" in beyond:
    Aperture 10


    Aperture 2.8


    Thanks for all replies
    Last edited by tiger74; 30th December 2009 at 11:45 PM.

  6. #26
    Senior Member NovJoe's Avatar
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    Default Re: Bokeh Pic

    Tiger74,

    There are a few points which you are still missing out. Be it at 50mm or 200mm, you need to focus on a single subject to understand the bokeh differences. The 2 above pictures do not contain the "subject" and distance to prove what the lens is capable of.

    I suggest you to do this:
    1) Find a table, place a sheet of white A4 paper on it.
    2) Place 3 coffee cups on the A4 paper in a single line with 10cm apart from each other.
    3) Place the rightmost coffee cup 10cm behind the middle cup.
    4) Place the leftmost coffee cup 15cm behind the middle cup.
    5) You should see the 3 cups forming a triangular shape after the placements.
    5) Set your lens at 17mm f/2.8 and focus sharp at the middle cup from 50cm away and shoot.
    6) Set your lens at 17mm f/10 and focus sharp at the middle cup from 50cm away and shoot.
    7) Set your lens at 50mm f/2.8 and focus sharp at the middle cup from 50cm away and shoot.
    8) Set your lens at 50mm f/10 and focus sharp at the middle cup from 50cm away and shoot.
    9) Compare all 4 images and you should know what we are trying to explain to you.

  7. #27
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    Default Re: Bokeh Pic

    Much appreciated for the guidance NovJoe!! That's certainly not in the Canon book.
    I'll try that.

  8. #28
    Senior Member NovJoe's Avatar
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    Default Re: Bokeh Pic

    No worries. We are all here to learn and share with each other .

  9. #29
    Moderator Octarine's Avatar
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    Default Re: Bokeh Pic

    Quote Originally Posted by tiger74 View Post
    Much appreciated for the guidance NovJoe!! That's certainly not in the Canon book.
    I'll try that.
    Looking at some of your pictures you should read the chapters about focusing and handshake. No point trying to compare images about background blur when finally everything is blur due to handshake or focusing errors.
    EOS

  10. #30
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    Default Re: Bokeh Pic

    ....bokeh from lense types; samples below, click thumbnails for enlarge view:

    85mm micro lense


    70-300mm zoom lense


    55-200mm zoom lense
    Last edited by khock520; 31st December 2009 at 03:23 PM.

  11. #31

    Default Re: Bokeh Pic

    Quote Originally Posted by NovJoe View Post
    I've took some comparison shots using my CZ 50/1.4 before and you can see the difference between f1.4 and f4 from the pictures below.
    can see meh? the background is clean already so there is nothing to 'see the difference'.

    if you're talking about how more of the tag is in focus @ f/4, that is depth of field, not bokeh.

  12. #32
    Senior Member NovJoe's Avatar
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    Default Re: Bokeh Pic

    Quote Originally Posted by spartacus.ret View Post
    can see meh? the background is clean already so there is nothing to 'see the difference'.

    if you're talking about how more of the tag is in focus @ f/4, that is depth of field, not bokeh.
    You are right. That 2 photos are for DOF not bokeh. TS is pretty confused over bokeh and DOF so I show him the difference of the 2 different f-stops. The other post of the cups is about bokeh. One thing at a time as he is already quite confused.
    Last edited by NovJoe; 2nd January 2010 at 11:04 AM.

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