Focus Issues with Nikkor 50mm f/1.8

Discussion in 'Photography Beginners' Forum' started by TheSolicitor, Mar 19, 2010.

  1. TheSolicitor

    TheSolicitor TPF Noob!

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    Good afternoon, gang.

    I have a Nikkor 50mm f/1.8 that I've been playing with for a while for some portraiture stuff and the like. However, one of the biggest issues that I'm having with it is that sometimes I get it right, and sometimes the focus is WAY off. When I say way off, I'm not talking about "oh that's a little blurry" I'm saying that it's way off in a way that is frankly embarrassing. The shot looks clear through the view finder and then looks clear on the LCD screen. I load the photos onto my computer and they are blurry, from time to time they're actually clear, and my they are tack-sharp.

    Additional Information:
    The lens is a manual focus, I am shooting with a D5000, and I have the diopter correction on the lens to -1.0. I do wear contacts and glasses and have noticed no difference between the two as far as hit or miss. I use Photoshop Bridge, Photoshop Elements 7, and iPhoto (depending on what I am doing with the photographs).

    Any advice? Fixes? Just get better and don't screw it up?

    Thanks in advance!
     
  2. matfoster

    matfoster TPF Noob!

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    do you have a photo buddy you can hand the camera to, have them trim the diopter for their use and then see if they experience the same problem?
     
  3. mrpink

    mrpink No longer a newbie, moving up!

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    are you seeing the 'focus light' (green circle in the bottom left of viewfinder) light up when you believe the subject to be in focus?






    p!nK
     
  4. TheSolicitor

    TheSolicitor TPF Noob!

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    I do. That didn't even cross my mind! I'll do that this evening and report back with additional information.


    Again, I'll have to do this tonight. I've got a 10-24 mounted right now and won't be home for a little bit, but I'll do that and see what happens.

    Thanks to both of you for your responses. I'll see what I can diagnose!
     
  5. matfoster

    matfoster TPF Noob!

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    ok. good luck
     
  6. Dominantly

    Dominantly TPF Noob!

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    When you're having focus issues, are you shooting wide open at f/1.8? Does it vary with your shutter speeds? Do you experience the same problem when shooting on a tripod?
     
  7. TheSolicitor

    TheSolicitor TPF Noob!

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    I got it out and tried to focus it on my own ignoring the green light in the lower left hand corner of the viewfinder and low and behold, I was just a touch off. My girlfriend's hair was in focus, but her face wasn't all of the time. I shot her from f1.8 all the way up to f22 just to see how it would turn out.

    As it is, it was user error, and I wasn't even aware of the green light (chastise away) and was just a hair off. She used it too and had no issues getting it to focus (and she knows nothing about cameras, save P&S cameras).

    Thanks to everyone for all of the help! Now I have to make her brownies to make up for forcing her to be my model...
     
  8. mrpink

    mrpink No longer a newbie, moving up!

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    well now that you involved a model...

    :addpics:

    :mrgreen:



    p!nK
     
  9. TheSolicitor

    TheSolicitor TPF Noob!

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    Unfortunately, she asked me to delete them. I'll do better next time!!
     
  10. Sw1tchFX

    Sw1tchFX TPF Noob!

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    you're manually focusing a fast lens, on a camera with a viewfinder the size of a pinhole, it's really no wonder you're not getting 100% sharp pictures.

    I can barely MF my 50mm on my D700, it's just the DOF is so narrow, and my eyesight is so bad, it's almost impossible for me to see critical focus.
     
  11. iBats

    iBats TPF Noob!

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    guess what
    the d5000 doesnt have an af motor built in
     
  12. Dominantly

    Dominantly TPF Noob!

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    Captain obvious to the rescue. :lol:
     

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