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Thread: Taking photos in low light

  1. #1

    Default Taking photos in low light

    simple question:

    If I take photos in low light conditions but I can't use flash, is it ok to go with a low ISO film speed but with a longer exposure time? Or should I play with shutter speed, or aperture size?

    I would really like to use a low ISO speed because I found that ISO400 on my Canon S45 is very grainy.

  2. #2

    Default Re: Taking photos in low light

    Originally posted by red_ryder
    simple question:

    If I take photos in low light conditions but I can't use flash, is it ok to go with a low ISO film speed but with a longer exposure time? Or should I play with shutter speed, or aperture size?
    yes, of course it's ok to use low ISO + slow shutter speed as long as the exposure is ok. you can play around with different shutter speeds (which will of course affect required aperture) for different effects.

  3. #3

    Default

    Depends on what you are shooting.

    Low ISO + low light = long shutter speeds. You will need a tripod.

    If it is still life (buildings etc), no problem at all.

    If it is moving subjects (people etc), then no can do, because there will be motion blur.

  4. #4
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    Default Re: Taking photos in low light

    Originally posted by red_ryder
    simple question:

    I would really like to use a low ISO speed because I found that ISO400 on my Canon S45 is very grainy.
    Normally we use the term 'grainy' for film and 'noisy' for digital.

    Another option is to deliberately underexpose. i'm not sure about S45, but some sensors have enough dynamic range to accept up to 1 stop underexposrue and still come out ok- just have to shift the gamma or exposure curve in software.

    There are also software that reduces noise, like Photoshop's filters, or NeatImage. Can try those and see if they are a viable solution for you. You'll need a bit of time to learn them.

  5. #5
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    Default Re: Re: Taking photos in low light

    Originally posted by ST1100
    Another option is to deliberately underexpose. i'm not sure about S45, but some sensors have enough dynamic range to accept up to 1 stop underexposrue and still come out ok- just have to shift the gamma or exposure curve in software.
    Underexposing and then shifting the gamma or exposure should be similar to using higher ISO setting and hence will also have increase noise.

  6. #6
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    Default

    Remember, the longer the exposure, the higher number of hot pixels. This is despite using noise reduction/darkframe subtraction.

  7. #7

    Default

    low light still using low ISO is really counter-intuitive. really.

    go straight for high ISO. its not taht bad

  8. #8
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    Default

    Originally posted by clive
    low light still using low ISO is really counter-intuitive. really.

    go straight for high ISO. its not taht bad
    Yeah but low ISO with a tripod still yield superior photos if you do not need to freeze the action. DSLRs can hit 800 ISO with acceptable noise but consumer digicams can only use 200 ISO before the photo becomes too noisy.

  9. #9

    Default

    Then what if I wanna freeze the action in low light conditions?

  10. #10
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    Default Night SHot freeze

    Then what if I wanna freeze the action in low light conditions?
    Use a flash!!!

  11. #11

    Default Re: Night SHot freeze

    Originally posted by sulhan
    Use a flash!!!
    If flash is not allowed?

  12. #12

    Talking Re: Re: Night SHot freeze

    Originally posted by NiVleK
    If flash is not allowed?
    uze the widezt apperture ur cam have to gain the faztezt available shutter speed then .....

    but thiz may affect ur DOF .....


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