Zone Focusing/distance Scale

Discussion in 'Beyond the Basics' started by SimplyMo, Jul 23, 2008.

  1. SimplyMo

    SimplyMo TPF Noob!

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    I tried posting this in the beginner's forum, but haven't gotten any responses:-|...so i figured i'd try here..

    Ive never used a Depth of Field scale. But I am reading about it right now. So I'm curious...;-) On the lens, how do you know which aperture matches with which distance? Are the apertures matched to the appropriate distance by color? Maybe that sounds confusing.. I mean.. For example.. Let's say f/5.6 marking (on the lens) is PINK , and 7ft distance marking (on the lens) is also PINK, so they match.
    Is that how it is?
     
  2. Bifurcator

    Bifurcator TPF Noob!

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    Some lenses use colored index marks, some use just all white reference marks, I guess most lenses these days have no marks at all. For "matching" the aperture with the zone you want in focus you can use a DOF calculator or see it in real time if your camera has a DOF preview. I guess most people just get to know their lenses and then make an educated guess while shooting.
     
  3. saltface

    saltface TPF Noob!

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    Are there SLRs that don't have a preview?
     
  4. Bifurcator

    Bifurcator TPF Noob!

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    Umm.. I dunno... Did he specify SLR? With all the billions of cameras out there there must be some "cameras" that don't though right? I guess most or all "SLRs" do though. No?
     
  5. saltface

    saltface TPF Noob!

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    Sorry, I just thought with the question he was asking, he'd have an SLR.
     
  6. Bifurcator

    Bifurcator TPF Noob!

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    No need to be sorry. I think you're probably right. I was just being safe. :D Lots of SLR-Like and P&S cameras don't have a DOF preview for example. Most (?) range finders don't. And etc.
     
  7. RyanLilly

    RyanLilly No longer a newbie, moving up!

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    I think that some of the lower end XT or D40 may not have dof preview.
     
  8. usayit

    usayit No longer a newbie, moving up!

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  9. SimplyMo

    SimplyMo TPF Noob!

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    *she*:wink:(i) wasn't referring to any specific camera, in the question. i'm that much of a beginner, i wouldn't even know which camera's lens would have a ''depth of field scale"... (beginner in the technical side of photography)
    i use 3 separate SLR cameras (one being D-SLR) and none of them have such a scale on their lens. so i was just curious how one functions. is there a way to know which distance matches with wich aperture? like a color index marks.... ;)

    in fact, i would have never thought of using one, or desired so-- just being so familiar with manually focusing the camera to the eye, and understanding the various depths of field with each aperture.... does the depth of field scale really make all that much difference? (in helping)
     
  10. Steph

    Steph No longer a newbie, moving up!

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    I find it really useful and use it all the time when shooting landscapes. That way I can to make sure I get acceptable sharpness from foreground to background. Here are another 2 links that explain the use of the DoF scale (link1, link2)
     
  11. Garbz

    Garbz No longer a newbie, moving up!

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    Depends entirely on the lens. In the case of the following markings which I think you are talking about:
    [​IMG]

    Yes the colour of the line matches the colour of the aperture index, and the red dot denotes the IR focus shift.
     
  12. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

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