Depth of Field Preview - I Need Your Help!

Discussion in 'Photography Equipment & Products' started by cgennoe, Jul 3, 2008.

  1. cgennoe

    cgennoe TPF Noob!

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    Hello,

    In my EOS 30D manual, I'm reading about the DOF Preview button and this is only concept about my camera that I do not understand.

    "Press the DOF Preview button to stop down to the current aperture setting. The diaphragm in the lens will be set to the current aperture so you can check the depth of field through the viewfinder."

    I do understand aperture, shutter speed, DOField, range of acceptable focus, etc inside out.

    The instuctions call for achieving focus lock and then pressing the DOF preview button to determine the range of acceptable focus through the viewfinder. However, all that I am able to pick up on is that the image through the viewfinder becomes apparently underexposed when this button is pressed.

    What should I be looking for and what can you add to this definition to help be grasp this tool.

    I appreciate it!

    Colin :)
     
  2. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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