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Thread: Out of Focus...

  1. #1

    Default Out of Focus...

    Hi,

    What is the main issue to cause us always out of focus while shooting in Low Light Event??

    Subject: Face of Man
    apperture: 2.8 to 4
    ISO: 800-1600
    Low Ligh assistant beam: ON
    Focus Point: Centre

    Is it cause by the apperture setting?or s'ld i set the focus point to Multi?or...

  2. #2
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    Default Re: Out of Focus...

    My guess would be low shutter speed + subject movement...
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  3. #3

    Default Re: Out of Focus...

    Quote Originally Posted by blazer_workz View Post
    My guess would be low shutter speed + subject movement...

    s'ld not be low shutter speed problem...cause picture ok..just out of focus...not the hand shake problem..

  4. #4
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    Default Re: Out of Focus...

    Quote Originally Posted by mactreouser View Post
    s'ld not be low shutter speed problem...cause picture ok..just out of focus...not the hand shake problem..
    no picture, no talk for this kind of problem.

  5. #5

    Default Re: Out of Focus...

    if the person moves enough, he may be out of the DOF (relative to the pt of focus lock), esp @ f2.8 where DOF can be fairly shallow.

    pic pls! it would help...

  6. #6

    Default Re: Out of Focus...

    Thanks to all Sifu:


    post two here...

    http://www.flickr.com/photos/21298758@N06/2068377956/
    http://www.flickr.com/photos/21298758@N06/2067570307/

    No worries,just tell me the truth of the problem..

  7. #7

    Default Re: Out of Focus...

    First picture focus on the back (items on table) and 2nd picture looks like both a bit of shake and front focus (on glass at bottom left of girl). Did you use/select a central focusing point and some sort of focus lock?

  8. #8
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    Default Re: Out of Focus...

    my guess is
    1) user fault for focusing on wrong place
    2) the camera auto focus really sucks (the lighting is low, but not extremely low till a dSLR can't even handle properly even with AF-assist, having said that, most probably could be user error )
    3) ur lens got very bad front and back focus problem.
    Last edited by ExplorerZ; 27th November 2007 at 05:20 PM.

  9. #9

    Default Re: Out of Focus...

    i'm using Centre Focus not multi...

    Ya,not really can read the focus on low light (the camera)
    what i know is,even DSLR will not really can read in low light situation...

    So,is the conclusion=Cause by Low Light condition??

  10. #10

    Default Re: Out of Focus...

    If you sure you have focus correctly, perform this focus test at http://photo.net/learn/focustest/
    See my Photo Gallery at the Clubsnap

  11. #11
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    Default Re: Out of Focus...

    Quote Originally Posted by mactreouser View Post
    i'm using Centre Focus not multi...

    Ya,not really can read the focus on low light (the camera)
    what i know is,even DSLR will not really can read in low light situation...

    So,is the conclusion=Cause by Low Light condition??
    even if low light, the AF assist lamp can help in the focusing....
    i can tell this problem means a world o u, there is another one under fuji forum. next time post one can liao la...
    cameras are not made of tofu

  12. #12

    Default Re: Out of Focus...

    Those red-light LEDS or IR focus assist usually allows a camara to focus precisely even in pitch darkness. Maby have to 'tap tap' the shutter a few times to ensure you get proper focusing, or deliberately focus on an object at a different distance, then re-focus on your actual subject, but it's very achievable.

  13. #13
    Senior Member zac08's Avatar
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    Default Re: Out of Focus...

    suspect thin DOF and a general softness when wide open for your lens.
    Michael Lim
    My Flickr Site

  14. #14
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    Default Re: Out of Focus...

    1 assumption
    1. High ISO->noisy/grainy+cropped->makes picture look soft
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  15. #15

    Default Re: Out of Focus...

    fotophilic,

    bro.sorry ah..i thought Fuji is only for Fuji user...and others won't come in for helps...so for my safety,i post 2 places loh...just wish to get the right answ...don't mean to make trouble ya!!!


    Dream & Zac,

    what do Zac mean by softness??..is the (Soft,Standard,Hard) mode??
    Dream,ya..i did on my IR assist

  16. #16
    Senior Member zac08's Avatar
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    Default Re: Out of Focus...

    Some lenses are generally soft wide open, they only become tack sharp when stopped down.
    Michael Lim
    My Flickr Site

  17. #17

    Default Re: Out of Focus...

    do you have the exif data for the shots?
    but from what i'm seeing i'm thinking the oof is caused by
    1. shallow dof (due to aperature)
    2. focus point is off

    is this a P&S camera?
    if so i think their low light focusing capabilities are horrible (even with AF assist) could it be that you did not give it enough time to properly focus?
    Last edited by dw2chan; 28th November 2007 at 01:53 AM.

  18. #18
    Senior Member felixcat8888's Avatar
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    Default Re: Out of Focus...

    Quote Originally Posted by dw2chan View Post
    do you have the exif data for the shots?
    but from what i'm seeing i'm thinking the oof is caused by
    1. shallow dof (due to aperature)
    2. focus point is off

    is this a P&S camera?
    if so i think their low light focusing capabilities are horrible (even with AF assist) could it be that you did not give it enough time to properly focus?
    S6500FD is a "big" PnS cam, a prosumer . . .hehe . .
    Pentaxian for Life
    K1, KP, FA*28-70/2.8, FA31, 43 & FA77 Limiteds, K85/1.8, FA*200/2.8, A50/1.2



  19. #19

    Default Re: Out of Focus...

    Haa...Felix...so you din't face any problem as mine before?

  20. #20
    Senior Member felixcat8888's Avatar
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    Default Re: Out of Focus...

    Quote Originally Posted by mactreouser View Post
    Haa...Felix...so you din't face any problem as mine before?
    Have not tried low-light yet
    Pentaxian for Life
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