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Thread: How Aperture Selection Affects DOF and Background

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    Co-Founder James Shadle's Avatar
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    Default How Aperture Selection Affects DOF and Background

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    How Aperture Selection Affects DOF and Background

    Nikon 600mm Lens at about 30' This image is F4

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    Co-Founder James Shadle's Avatar
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    Nikon 600mm Lens at about 30' This image is F5.6

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    Nikon 600mm Lens at about 30' This image is F8

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    Nikon 600mm Lens at about 30' This image is F11

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    Nikon 600mm Lens at about 30' This image is F16

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    Nikon 600mm Lens at about 30' This image is F22

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    Here side by side, is a real world example.
    Do you want a smooth background or do you prefer a little more texture?

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    Here they are side by side, all in 1 stop increments.

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    Alfred Forns
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    Love the series James !!! Great examples !!!

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    This is excellent, thanks so much for posting! I am always looking for the f/4 setting on my 400mm lens, but it just isn't there. :( Maybe some day!! :) Thanks Captain.
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    Cant get better tutorial than this James
    TFS

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    Lance Peters
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    Nice James!!!
    Thanks for taking the time to do this for us.
    :)

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    Lifetime Member Jay Gould's Avatar
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    Cool series; you can see a change in the sharpness in the top of the piece of wood from aperture to aperture. Where was the actual focal point; in the center of the wood measured both ways?
    Cheers, Jay

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    great series , we can lern from those ... well done

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    Thank you for posting this, definitely help.

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    James:

    Great post.. That should be made a "sticky"..

    Dave

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    Very well done, James. Your test shots also show the effects of diffraction. The limb is not near as sharp at f/16 and f/22 as f/8.

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    Life Time Member Doug Brown's Avatar
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    Excellent stuff James!
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    Julie Kenward
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    If this doesn't help someone understand better why their background looks the way it does I don't think anything will. It just doesn't get any simpler than that!

  20. #20
    Xristos Zo
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    The side by side shots are very informative, thanks

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    Publisher Arthur Morris's Avatar
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    Well done Frog-teacher :)
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    James, very useful and the examples making it self explanatory

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    James, "seeing is believing". A lot of photographers could benefit from this visual tutorial.

    Thanks,

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    Thanks again for this lesson, much appreciated.

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    I have been back to this to check things out a couple times.

    Tks James.

    Dave

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    Akash Panchbudhe
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    Default best example for the beginers !!!

    thanks for such a great lesson.

    Sir, plz keep on posting such threats

    Rgds
    Akash

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    I am thinking that I like the smooth BKGRs :)
    BIRDS AS ART Blog: great info and lessons, lots of images with our legendary BAA educational Captions.: we will not sell you junk. 30+ years of long lens experience/e-mail with gear questions.
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    Great examples James. Thanks for the info.

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    Bokeh and the sharpness of the subject at given aperture seems to differ with every lens. Your lesson on the 600mm is as informative as it can get. Thank you.

  30. #30
    Eric Weaver
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    Very nice examples of the effects. Wanted to add to the comments that it also depends on how far away the background is to the subject. At different background depths each f stop will give a different effect than the ones shown. Things like lighting, blade shape and configuration, lens quality also come into play. My Canon lenses gave a much different bokeh than my Leica or Schneider lenses do as will a Nikon lens. This gives a good general visual representation of how it works. A nice starting point for folks to consider.

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