New & Need Help Choosing a Lense

Discussion in 'Photography Equipment & Products' started by kmk10us, Aug 3, 2010.

  1. kmk10us

    kmk10us TPF Noob!

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    Hello All,
    I have been looking to buy a new lense for my Nikon D5000. I want to have the subject (mostly my very young children) in focus and the background blurry. I am down to looking at the Nikon AF 50mm f/1.8 (around $130) and the Nikon AF-S 50mm f/1.4 (around $470). Being new I was going to buy the cheaper one until I found out that on my D5000 it would not auto focus without a motor on the actual lense (hence, the AF-S) I am assuming this is a huge deal? Especially if I am new and trying to take picture of moving subjects? Are there any other brands I could look at that would fit my camera? Any help would be greatly appreciated!!
    Thanks!
     
  2. Dao

    Dao No longer a newbie, moving up!

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    I believe the other brand is Sigma
    50mm F1.4 EX DG HSM - Standard Prime Lenses - SigmaPhoto.com

    However, the price is still up there with the Nikon version.


    Do you have a telephoto lens? If yes, you maybe able to achieve the similar effect with the telephoto lens when you have enough room (i.e. outdoor)
     
  3. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Then you will want to learn about Depth-Of-Field (DOF), how auto focus works, and it's limitations.

    There are 4 things that effect DOF:
    1. Lens focal length
    2. Lens aperture
    3. Subject to image sensor distance
    4. Subject to background distance.
    For DOF visit:
    Understanding Depth of Field in Photography
    Depth of field - Wikipedia, the free encyclopedia
    http://www.tawbaware.com/maxlyons/calc.htm
    Online Depth of Field Calculator

    For auto focus visit:
    Understanding Camera Autofocus
    Autofocus - Wikipedia, the free encyclopedia
     

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