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Thread: Camera can't focus

  1. #1

    Lightbulb Camera can't focus

    Ehhh, this may sounds like a stupid question to many
    But am new to SLR, so pls shed some light

    Even when i'm using Av mode or M mode, i'm not able to focus, as such, it doesn't allow me to take a shot at all.
    Issit because i'm too near the object?
    I am trying to focus the object close with a low aperture to create the bokeh effect.
    Even when i switch back to Auto mode, i can't focus too.
    What's wrong?

    Thanks

  2. #2

    Default Re: Camera can't focus

    Quote Originally Posted by Yellow Elephant View Post
    Ehhh, this may sounds like a stupid question to many
    But am new to SLR, so pls shed some light

    Even when i'm using Av mode or M mode, i'm not able to focus, as such, it doesn't allow me to take a shot at all.
    Issit because i'm too near the object?
    I am trying to focus the object close with a low aperture to create the bokeh effect.
    Even when i switch back to Auto mode, i can't focus too.
    What's wrong?

    Thanks
    Take note of the minimum focusing distance of a lens. If you are too close, the lens cannot focus on the subject and you will be unable to trigger the shutter.

  3. #3
    Senior Member Diavonex's Avatar
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    Default Re: Camera can't focus

    How far is the subject from your camera?

  4. #4

    Default Re: Camera can't focus

    Quote Originally Posted by spree86 View Post
    Take note of the minimum focusing distance of a lens. If you are too close, the lens cannot focus on the subject and you will be unable to trigger the shutter.
    i'm using the 18-135mm lens.
    The object can be ard 10cm away from the lens; and I can't focus already.
    Sometimes, you can auto focus "motor" trying very hard, but it just couldn't focus.
    Similarly to the flash light. Sometimes, it flicker a few times, but just can't focus and capture the shot.

  5. #5
    Senior Member Diavonex's Avatar
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    Default Re: Camera can't focus

    You are too near to the subject.

  6. #6
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    Lol, the min focus distance I ever vaguely heard of is 18cm. Assuming u calculate the front of ur lens, it still only like 20cm from sensor. It's way too short, move back another 10 to 15cm
    Equipment: D800|D700|11-16|28-75|105 Micro VR|50 F1.4G|85 F1.8G
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  7. #7
    Senior Member bonrya's Avatar
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    Default

    You're either too close to the subject or shaking too violently.
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  8. #8
    Senior Member shierwin's Avatar
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    Default Re: Camera can't focus

    Quote Originally Posted by Yellow Elephant View Post
    i'm using the 18-135mm lens.
    The object can be ard 10cm away from the lens; and I can't focus already.
    Sometimes, you can auto focus "motor" trying very hard, but it just couldn't focus.
    Similarly to the flash light. Sometimes, it flicker a few times, but just can't focus and capture the shot.
    EFS 18-135mm minimum focusing distance is 45cm

  9. #9

    Default

    Quote Originally Posted by shierwin

    EFS 18-135mm minimum focusing distance is 45cm
    Oh...wow Thanks, this is very useful information. Now it makes sense.

  10. #10
    Member willdoang's Avatar
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    Default Re: Camera can't focus

    Quote Originally Posted by Yellow Elephant View Post
    i'm using the 18-135mm lens.
    The object can be ard 10cm away from the lens; and I can't focus already.
    Sometimes, you can auto focus "motor" trying very hard, but it just couldn't focus.
    Similarly to the flash light. Sometimes, it flicker a few times, but just can't focus and capture the shot.
    too close la, no lens by default got min focus 10cm, the closest still date only 19cm min focus, unless u use extention tubes now that makes diff, ur lens min focus is 45cm as mentioned by other, so ya 10 cm is too too close liao lol XD
    i buy i sell i use, repeat, such are the vicious endless cycle of GAS

  11. #11

    Default Re: Camera can't focus

    Quote Originally Posted by willdoang View Post
    too close la, no lens by default got min focus 10cm, the closest still date only 19cm min focus, unless u use extention tubes now that makes diff, ur lens min focus is 45cm as mentioned by other, so ya 10 cm is too too close liao lol XD
    10cm away from lens is not the same as 10cm min. focusing distance. The distance starts from the sensor. Nonetheless, its too near to focus

  12. #12

    Default Re: Camera can't focus

    I see it all the time... Newbie DSLR owners in coffee shops, wanting to take a picture of their food/cake/coffee and wondering why the camera can't lock focus. :P


    Oh, FYI, there is no such thing as a "bokeh effect".
    Alpha

  13. #13
    Member willdoang's Avatar
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    Default Re: Camera can't focus

    Quote Originally Posted by spree86 View Post
    10cm away from lens is not the same as 10cm min. focusing distance. The distance starts from the sensor. Nonetheless, its too near to focus
    yes my mistake, should be from the focalplane
    i buy i sell i use, repeat, such are the vicious endless cycle of GAS

  14. #14

    Default Re: Camera can't focus

    Quote Originally Posted by willdoang View Post
    yes my mistake, should be from the focalplane
    No problem Distance from the front element is known as the "working distance"

  15. #15
    Senior Member Diavonex's Avatar
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    Default Re: Camera can't focus

    Quote Originally Posted by willdoang View Post
    too close la, no lens by default got min focus 10cm, the closest still date only 19cm min focus, unless u use extention tubes now that makes diff, ur lens min focus is 45cm as mentioned by other, so ya 10 cm is too too close liao lol XD
    My 30mm Macro have a minimum focusing distant of 13mm without extension tube

    http://www.sony.com.sg/product/sal30m28

  16. #16
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    Default

    Quote Originally Posted by Diavonex

    My 30mm Macro have a minimum focusing distant of 13mm without extension tube

    http://www.sony.com.sg/product/sal30m28
    Haha luckily I said vaguely remember. Think nikon line up is either the 60mm or 55mm micro with the shortest focus distance
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  17. #17
    Moderator ziploc's Avatar
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    Default Re: Camera can't focus

    [Moderator's note]

    Please refraint from too much OT, thanks.

  18. #18

    Default Re: Camera can't focus

    Quote Originally Posted by Yellow Elephant View Post
    i'm using the 18-135mm lens.
    The object can be ard 10cm away from the lens; and I can't focus already.
    Sometimes, you can auto focus "motor" trying very hard, but it just couldn't focus.
    Similarly to the flash light. Sometimes, it flicker a few times, but just can't focus and capture the shot.
    erm, 10cm is too near for the 18-135 lens to focus liao... trying shifting your subject further away from the cam... there is also a MFD, pay attention to that...

  19. #19

    Default Re: Camera can't focus

    Anyway I met the same issue when I first used 600D. That time I thought camera or lens spoilt liao
    Canon EOS 600D | BBB virus carrier

  20. #20

    Default Re: Camera can't focus

    Guess I'll continue to sound silly through my learning process...
    Please be patient with me

    And thanks for the quick replies!

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