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Thread: A Question on DOF

  1. #1

    Default A Question on DOF

    Given that for both setups, same camera and aperture values are used. Same magnification (1:1) is achieved. Will the DOF be the same?

    Setup 1:
    Lens: 180mm macro lens
    Working distance: 25cm
    Magnification: 1:1

    Setup 2:
    Lens: 90mm macro lens
    Working distance: 9cm
    Magnification: 1:1

    Understand that perspective (angle of view) wise there is a difference, due to the different focal length of each lens. But does it affect the DOF?

    Anyone can give an answer to the above question?
    Last edited by azone; 25th July 2003 at 12:00 PM.

  2. #2
    Join Date
    Jul 2003
    Singapore, North Area


    no the DOF will not be the same cos one of the factor for DOF is the focus length..... So if I'm not wrong, your 180mm will give you a shallower DOF at the same f stop and focus distance. In addition, your subject to background distance will also determind your DOF.....

    Do a search on DOF on any search engine and you might be able to find out more....

    Hope this helps.....


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