A&P Help! Autofocus sucks in low light...

Discussion in 'Lifestyle' started by xenon supra, Aug 20, 2008.

  1. xenon supra

    xenon supra OT Supporter

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    Not sure if a setting got fucked up or if maybe this normal, but my camera seems to be having a lot hard time focusing in low light situations than it used to. Maybe its the same, but I feel like something got changed.

    What are the settings I should check that may be affecting this.

    I was trying to shoot a "gallon challenge" milk contest tonight and my camera would never focus when I wanted it to, which made me miss a lot of the good barfing action shots.

    I was just using the D300 and pop-up flash, I don't really care too much about the quality of these pics, they were just for fun...

    Any ideas?

    Example of a pic after it finally focused, just so you can have an idea of the darkness (flash was fired):

    [​IMG]
     
  2. Killyin

    Killyin Vicariously I, live while the whole world dies.

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    Did the camera pre-fire the flash to help aid auto-focusing?

    My 430EX emits a visable light matrix to help the camera auto focus. :hs:
     
  3. Keegan

    Keegan New Member

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    Damn coloured milk. Never thought of that... haha.
    I'm not too familiar with your model, but some Canons will do a pre-flash like Kill said, and my 580ex will emit the red lights to help focus. Look into an external flash perhaps down the road?
     
  4. xenon supra

    xenon supra OT Supporter

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    I've got an external flash I just didn't feel like lugging it around all night.

    Also, what if I want to shoot without a flash at say ISO 6400 or something :dunno:
     
  5. xenon supra

    xenon supra OT Supporter

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    My "built in AF assist illuminator" is turned ON. :hs:
     
  6. Bloke

    Bloke Banned

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    do you see it flash?
     
  7. xenon supra

    xenon supra OT Supporter

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    I think its a little beam that provides a little light, and whenever that would come on it would usually focus, but it didn't come on all the time.

    its the clear circle about 1 inch to the right of the shutter

    [​IMG]
     
  8. White Stormy

    White Stormy Take that, subspace!

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    you got aids
     
  9. aCab

    aCab New Member

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    What lens were you shooting with? Most modern DSLRs focus at their max aperture. So, that can change a lot with the AF due to the fact that the AF sensor isn't getting as much light to it. The more light the sensor gets, the better focusing.
     
  10. aCab

    aCab New Member

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    Checking the EXIF, you used something with a max aperture of f/2.8. AF would be greatly (and I go mean greatly) improved with an f/1.4 lens. Heck, even a f/1.8 or f/2 lens would do better.
     
  11. xenon supra

    xenon supra OT Supporter

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    It's a 2.8 lens.

    28-70mm the beast
     
  12. mojito

    mojito New Member

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    :nikowned:
     
  13. FusionZ06

    FusionZ06 /\__/\__/\__0>

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    What focus mode were you using?

    51? 9? Single? Did you have the 3D stuff on?
     
  14. xenon supra

    xenon supra OT Supporter

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    21 point no 3d
     
  15. adamlewis88

    adamlewis88 New Member

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    Problem is...



    Its a Nikon :mamoru:
     
  16. redna

    redna New Member

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    How low of light are we talking about here...
     
  17. Bloke

    Bloke Banned

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    shouldnt matter, it can always use the AF assist light.
     
  18. Bloke

    Bloke Banned

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    :ugh:
     
  19. xenon supra

    xenon supra OT Supporter

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    thats what I thought :hs:
     
  20. mobbarley

    mobbarley Active Member

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    does this pissy little light have a 50m range?
     
  21. xenon supra

    xenon supra OT Supporter

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    no... maybe like 30 ft? :dunno:
     
  22. xenon supra

    xenon supra OT Supporter

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    but i was't far from my subject
     
  23. FusionZ06

    FusionZ06 /\__/\__/\__0>

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    30ft is pretty far
     
  24. redna

    redna New Member

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    Actually, if he's trying to shoot in low light, and trying to autofocus on an object 20 feet away, that AF light is going to do him little to no good...
     
  25. TomDlgns

    TomDlgns OT Supporter

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    i was going to mention this.

    but i dont use nikon so i dont know what it is called.

    for me, it was a simple setting and it focused perfect in low light.
     

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