Professional Web Applications Themes

Hyperfocal distance - Photography

Could someone please remind me of the true definition of the term "Hyperfocal distance", please?...

Sponsored Links
  1. #1

    Default Hyperfocal distance

    Could someone please remind me of the true definition of the term
    "Hyperfocal distance", please?


    Sponsored Links
    David Guest

  2. #2

    Default Re: Hyperfocal distance

    "David" <com> wrote in message 


    Hyperfocal distance is where you set your focus so that you're not
    wasting the depth of field behind the subject (which falls beyond
    infinity anyway), and so gives you closer focus in the foreground.

    --
    Jeff Cook
    com
    Cook Studios, LLC
    Video Editing & Training
    Aerial Photography & the Web
    Based in Washington DC
    http://www.cookstudios.com


    Jeff Guest

  3. #3

    Default Re: Hyperfocal distance

    According to the glossary at Canon's EOS lens web site:

    = = = = =

    Hyperfocal distance

    Using the depth of field principle, as a lens is gradually focused to her subject
    distances, a point will eventually be reached where the far limit of the rear depth of
    field will be equivalent to "infinity." The shooting distance at this point, i.e., the
    closest shooting distance at which "infinity" falls within the depth of field, is called
    the hyperfocal distance.

    The hyperfocal distance can be determined as follows:

    Hyperfocal distance =

    f^2
    --------
    d F


    Where:
    f: = focal length
    F: = F number
    d: = minimum circle of confusion diameter

    Thus, by presetting the lens to the hyperfocal distance, the depth of field will extend
    from a distance equal to half the hyperfocal distance to infinity. This method is useful
    for presetting a large depth of field and taking snapshots without having to worry about
    adjusting the lens focus, especially when using a wide-angle lens. (For example, when the
    EF 24 mm is set to f/11 and the shooting distance is set to the hyperfocal distance of
    approximately 1.5m/4.9ft, all subjects within a range of approximately 70cm/2.3ft from the
    camera to infinity will be in focus.)

    = = = = =


    "David" <com> wrote in message
    news:_lujb.389$server.ntli.net... 


    RSD99 Guest

  4. #4

    Default Re: Hyperfocal distance

    Thanks for that ,Guys!
    I understand the principle and practice, but wished to hear (or see) a
    dictionary definition of the term.
    Got it now!


    David Guest

Similar Threads

  1. snap distance > pick distance impossible?
    By TonMarkus in forum Macromedia Freehand
    Replies: 1
    Last Post: July 14th, 05:53 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139