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Thread: Aperture question

  1. #1
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    Default Aperture question

    I think i got a rather newbie question...

    If we focus on a subject then we shoot with the biggest aperture, we may see the side blurring or maybe sides of the focus area become blur. when we close down the aperture, the picture seem to be sharper from the centre of focus to outwards.

    question is... the sharpness is rendered in circular or polygonal (eg, square, diamond, rectangular, octagon, etc...)
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  2. #2
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    Default Re: Aperture question

    hmm, my newbie guess is circular, since the lens aperture is circular... wait if lens with 8 blades, does it make it octagonal
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  3. #3
    Senior Member yyD70S's Avatar
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    Default Re: Aperture question

    That's where the abstract issue of "bokeh" comes in... but I guess you are referring to the background blurrness.

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    Default Re: Aperture question

    Quote Originally Posted by yyD70S
    That's where the abstract issue of "bokeh" comes in... but I guess you are referring to the background blurrness.
    yeap yeap... was thinking of the 'circle of influence' but which shape takes form... any test to confirm? or maybe its oval?...
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  5. #5
    Senior Member yyD70S's Avatar
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    Default Re: Aperture question

    Please refer to the link below:

    http://www.kenrockwell.com/tech/bokeh.htm

    Do a search of the CS forums; you should be able to find discussions on the matter.


    Regards

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