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Thread: ISO speed

  1. #1

    Default ISO speed

    How do you decide on which iso speed to use? Is there any guideline? Eg iso100 for fireworks
    Thanks

  2. #2

    Default Re: ISO speed

    Where possible always the lowest with out affecting exposure and getting blurs, be it motion or handshake. thats all.

  3. #3

    Default Re: ISO speed

    Thanks Pal

  4. #4
    Moderator catchlights's Avatar
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    Default Re: ISO speed

    use the lowest ISO speed whenever is possible, subject to have enough depth of field, handheld speed, flash power or prevent motion blur.

    unless you want the grainy or noise effect of the high ISO.
    Shoot to Live, Live to Shoot
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  5. #5
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    Default Re: ISO speed

    Think of how you want to shoot first. Decide on your aperture and shutter you want to use. If not possible to achieve, boost ISO as last resort.
    Canon 5D mkII|24-105 F4 IS L|70-200 F4 IS L|135 F2 L|580EX|

  6. #6
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    Default Re: ISO speed

    as a rough guide, i use:

    200-daylight
    200-with flash unit
    400-overcast or indoor wif light
    800-ballroom hotel conditions

    for me, i try not to go above that

  7. #7

    Default Re: ISO speed

    thanks thanks

  8. #8
    Senior Member zac08's Avatar
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    Default Re: ISO speed

    Unless you want noise to appear like film grain, then use higher ISO.
    Michael Lim
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  9. #9
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    Default Re: ISO speed

    well it really depends on the other things like shutter and aperture, but usually i'll use:

    daylight: 100
    indoors with lots of ambient light: 400
    flash: 400 or 800
    but indoors i generally use 800. there isn't enough noise to worry about.

    then again, it's all relative on other conditions...none of those are fixed parameters as such.
    5D | 24-70L | 28mm f/1.8 | 580EX

  10. #10

    Default Re: ISO speed

    are we talking about film or DSLR, on DSLR ISO is consider equivenlent to film, but there are many differnce, b'cos of different media used, always take this in consideration

  11. #11
    Senior Member zac08's Avatar
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    Default Re: ISO speed

    Quote Originally Posted by AppleTree View Post
    are we talking about film or DSLR, on DSLR ISO is consider equivenlent to film, but there are many differnce, b'cos of different media used, always take this in consideration
    Well, these days, there are advances and the ISO ratings for the DSLRs are beginning to be better than those equiv for film...
    Michael Lim
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