DOF calculator

Discussion in 'Photography Beginners' Forum' started by Sapper44, Aug 7, 2010.

  1. Sapper44

    Sapper44 TPF Noob!

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  2. edouble

    edouble TPF Noob!

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    I have a DOF calculator on my Droid that I use often
     
  3. misstwinklytoes

    misstwinklytoes TPF Noob!

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    I have a droid. Would you mind sharing the name of the application?
     
  4. edouble

    edouble TPF Noob!

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    Sure, "Depth of Field Calculator" for photographers by Allen Zhong. Very handy application!
     
  5. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The DOF Master link has been offered up hundreds of times here at TPF.

    Another site I found recently that has photographic calculators of various types and offers a nice DOF chart, is: http://www.tawbaware.com/maxlyons/calc.htm
     
  6. misstwinklytoes

    misstwinklytoes TPF Noob!

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    tyty!
     
  7. clanthar

    clanthar TPF Noob!

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    I used to have a DOF and hyperfocal distance calculator on every lens/camera I owned. Now you have to get an app for your phone -- modern photography has regressed quite a bit.

    Joe
     
  8. misstwinklytoes

    misstwinklytoes TPF Noob!

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    Maybe I'm just slow, or just new or... something. :er:

    But can someone tell me how to read this thing? Or how I'm supposed to apply it?
     
  9. edouble

    edouble TPF Noob!

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    The app. that I directed you to is fairly simple.

    1. Select your camera, or one similar
    2. Enter desired f stop (aperature size/f number)
    3. Enter focal length ie. 35mm, 27mm, 200mm
    4. Distance to subject. I choose feet and measure or estimate the distance to the focus point or subject
    5. Calculate or diagram. Calculates near and far focus range and distance between near and far focus points. Or it displays a little diagram showing you this.
     
  10. misstwinklytoes

    misstwinklytoes TPF Noob!

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    Like I said, maybe I'm slow, but I don't know how to apply this information. I understand what it's telling me, but it seem slike it would be more useful to do this and then position your subject at the focal point?
     
  11. edouble

    edouble TPF Noob!

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    OK....I will take one more stab at this LOL. Maybe you do not understand what DOF is. DOF or DEPTH OF FIELD is a measurement, wheather calculated mathematically or subjective. DOF determines or shows the amount of sharply in focus areas either in front of or behind the subject.

    Such as for portrait photography often it is desirable to have the background extremely blurry to the point of being unrecognizable. This draws the viewers eye to the subject instead of a distracting background. Likewise this could be used in macro photography where the DOF is very narrow. Only a small portion of the image maybe in focus such as a bee or bird.

    DOF is used creatively to draw the viewers eye to a certain area of a photograph or to isolate the subject in a photography from distracting foreground/background. This is why a DOF calculator maybe useful to have handy while shooting.


    Hope this helps you.
     
  12. edouble

    edouble TPF Noob!

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    I will add that focal length, aperatur size and distance from the subject are the determining factors in DOF. A longer focal length with a high f number might produce the same DOF as a smaller focal length and smaller f number. Go out and see yourself, practice practice practice!!!!

    It is a ratio game and is easy to understand and grasp with practice. Soon you will not even need a calculator!
     

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