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  1. #1
    Junior Member rockcrusher's Avatar
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    Returning to SLR and a few questions

    I used to use an SLR to shoot mostly Autocross events about a decade ago. Then got a Digital elph and other point and shoots and just stopped using film. Fast forward to recently when I picked up a DSLR (canon t1i) and I am back to shooting photos again (not cars this time).

    I used to remember the whole depth of field thing but for the life of me I can't remember it at all. Can some one give me a brief refresh or point me to a source where i could review it?

    I have a canon t1i with the 18-55 lens.

  2. #2
    Senior Member Anbesol's Avatar
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    Re: Returning to SLR and a few questions

    depth of field is dictated by magnification and aperture. greater magnification and wider apertures produce narrower depth of field. Your 18-55 doesn't have much dof range with its variable aperture.

  3. #3
    Be serious Franglais's Avatar
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    Re: Returning to SLR and a few questions

    There are just two things to remember with depth-of-field:

    - the longer the focal length of the lens the smaller the depth-of-field
    - the wider the aperture the smaller the depth-of-field

    An online calculator is here: http://www.dofmaster.com/dofjs.html

    You might have noticed that you have less depth-of-field on your DSLR than you had on your point-and-shoots. This is because the focal length of the lenses on the DSLR is longer to match the bigger sensor.
    Charles

    Nikon D800, D7200, Sony RX100m3
    Not buying any more gear this year. I hope

  4. #4
    Junior Member rockcrusher's Avatar
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    Re: Returning to SLR and a few questions

    Ok thanks for the clarification on that and the website links.

    It has been so long and I generally used a shorter lens as the main thing I was looking for before was intense colors and motion blurs. I now have kids and a life other than photographing cars and driving cars and have developed a passion for capturing mountain bike rides and the stuff I see on them. The point and shoots were nice for compact ease of use but the photos all really came out the same, huge depth of fields, a lot of time the rider gets lost in the shots which is a good and bad.

    Looking forward to getting out and giving this a try. I guess since it isn't film I can play around and instantly see the difference with different settings too. Ain't the technology grand!

  5. #5
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    Re: Returning to SLR and a few questions

    Quote Originally Posted by Franglais View Post
    There are just two things to remember with depth-of-field:

    - the longer the focal length of the lens the smaller the depth-of-field
    - the wider the aperture the smaller the depth-of-field

    An online calculator is here: http://www.dofmaster.com/dofjs.html

    You might have noticed that you have less depth-of-field on your DSLR than you had on your point-and-shoots. This is because the focal length of the lenses on the DSLR is longer to match the bigger sensor.
    Wow that's a handy website, someone needs to turn that thing into a smartphone app!! (preferably for Android )

  6. #6
    NSSA/AIPS
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    Re: Returning to SLR and a few questions

    Quote Originally Posted by flyinion View Post
    Wow that's a handy website, someone needs to turn that thing into a smartphone app!! (preferably for Android )
    well there are a few..
    http://www.google.com/search?client=...UTF-8&oe=UTF-8
    It's not about the camera....

  7. #7
    Senior Member Anbesol's Avatar
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    Re: Returning to SLR and a few questions

    - the longer the focal length of the lens the smaller the depth-of-field
    I said "magnification" to include both focal length and subject distance. Distance also impacts DOF.

  8. #8
    Be serious Franglais's Avatar
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    Re: Returning to SLR and a few questions

    Yep. I forgot about distance. I was thinking about how I was going to say that point-and-shoots have greater depth-of-field than DSLR's without having to explain why the lens focal length is shorter on a point-and-shoot.
    Charles

    Nikon D800, D7200, Sony RX100m3
    Not buying any more gear this year. I hope

  9. #9
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    Re: Returning to SLR and a few questions

    Quote Originally Posted by Chris350 View Post

    :thumbsup:Nice I never even thought about the fact that there really might be some. Time to go browsing the Market hehe.

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