Focal length + DOF

Discussion in 'Help and Feedback' started by teefin1, Dec 24, 2012.

  1. teefin1

    teefin1 TalkEmount Top Veteran

    Sep 7, 2012
    Am I correct in assuming that a longer focal length with a larger F number can possibly effect equal or shallower DOF to shorter focal length/smaller F number?

    (I.e 50mm 1.8 v 85mm 2.8)
  2. nianys

    nianys TalkEmount All-Pro

    Aug 23, 2012
    It's taken me long to realize how much focal length has in fact MORE impact on compressing backgrounds and creating blur, than aperture itself. A 135/3.5 very easily totally erases backgrounds, sometimes more do than a 35/2, for instance. Distance to subject, and from subject to background, is also tremendously important.