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Thread: ISO?

  1. #1

    Default ISO?

    Guys can explain to mi wad is ISO 1600, 800 etc ??

  2. #2

    Default Re: ISO?

    Image Stabiliser On

    Otherwise it's equivalent to the film speed ( http://en.wikipedia.org/wiki/Film_speed )
    It is the camera, not the photographer.
    my flickr - adamloh.com

  3. #3

    Default Re: ISO?

    Quote Originally Posted by adamadam View Post
    Image Stabiliser On

    Otherwise it's equivalent to the film speed ( http://en.wikipedia.org/wiki/Film_speed )

    i dun think its Image Stabiliser On, its International Standard Organisation. Film speed is right though. http://http://www.photoxels.com/tutorial_iso.html
    Canon 400D / Rebel XTi Gripped EFS 17-85mm / 50mm f/1.8
    http://jerryyang.deviantart.com

  4. #4

    Default Re: ISO?

    ISO too high will cause more noise in the pic?

  5. #5
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    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    ISO too high will cause more noise in the pic?
    Yes it will. But pro series cams usually can handle low noise at very high ISO levels.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  6. #6
    Senior Member zac08's Avatar
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    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    ISO too high will cause more noise in the pic?
    Depends on how packed the sensor is with the pixels... the higher the density, the more likely the noise will be bad. That said, they are getting better and better with each technology inprovement.
    Michael Lim
    My Flickr Site

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    Default Re: ISO?

    Quote Originally Posted by JerrySH View Post
    i dun think its Image Stabiliser On, its International Standard Organisation.
    it think he knows it. it's just meant to be a joke

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    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    Guys can explain to mi wad is ISO 1600, 800 etc ??
    It's the light sensitivity of the sensor.
    Way back to film time, it was controlled by the material and chemical on film, which expose while contacting to light. The higher the ISO, the more sensitive to light. Of course, the "noise" will increase accordingly, as the light sensitive chemical have to react with very little light as well.

    Now the "D era, it's a electronic light sensor that replace the film. The same physics have to apply, the higher the sensitivity, the more "noice" you'll feel. Technology can slowly improve this, but cannot change the fact.
    Sony Alpha

  9. #9

    Default Re: ISO?

    So in wad conditions i should use higher ISO and Lower ISO?

  10. #10

    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    So in wad conditions i should use higher ISO and Lower ISO?
    high ISO allows you to have higher shutter speed during condition when light is not enough.. higher shutter speed will decrease chances of blur..

  11. #11
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    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    So in wad conditions i should use higher ISO and Lower ISO?
    For me i constantly change the ISO according to the lighting conditions. For night scenes, always at 100 as the night sky will show noise more obviously at higher ISOs, example is 400.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

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    Default Re: ISO?

    Quote Originally Posted by codzwordz View Post
    So in wad conditions i should use higher ISO and Lower ISO?
    Try more and you will know.
    There're moment that you need high speed in low light, no choice, have to use high ISO.
    Sony Alpha

  13. #13
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    Default Re: ISO?

    in the common salesperson vocab, ISO = "Image Stabilizer On". especially thos in SLS or Lucky Plaza.

  14. #14

    Default Re: ISO?

    Quote Originally Posted by TMC View Post
    in the common salesperson vocab, ISO = "Image Stabilizer On". especially thos in SLS or Lucky Plaza.
    Heheh...
    Then every digital camera have image stabilization.

  15. #15

    Default Re: ISO?

    Quote Originally Posted by TMC View Post
    in the common salesperson vocab, ISO = "Image Stabilizer On". especially thos in SLS or Lucky Plaza.
    Yah... the higher you "on" the ISO, the more stable your picture...

    BC

  16. #16
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    Default Re: ISO?

    Quote Originally Posted by Scaglietti View Post
    Yah... the higher you "on" the ISO, the more stable your picture...

    BC
    And the more noisy your pics will be too.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  17. #17

    Default Re: ISO?

    i remember the first time i bought my d80 and the dude from john 316 was talking to me about noise reduction intro me to the camera. my mum was like...eh this camera can record sound ah??


    anyway imho, try to keep your iso as low as possible...only bump up when necessary. safe to bump up is not beyond a 1000 or at least thats my rule. haha.
    nikon d700 nikkor 50mm f1.4 nikkor 55mm micro ais f2.8 nikkor 35 f2 sb 600 sb800 leica m4

  18. #18

    Default Re: ISO?

    most important to reduce noise is to expose the shot properly... if proper exposure is not possible with the current sensitivity, better to bump up the sensitivity then to under expose (at least for jpgs)...

  19. #19
    Senior Member zac08's Avatar
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    Default Re: ISO?

    Quote Originally Posted by theRBK View Post
    most important to reduce noise is to expose the shot properly... if proper exposure is not possible with the current sensitivity, better to bump up the sensitivity then to under expose (at least for jpgs)...
    Yes... pls note that a under-exposed shot actually induces more noise than a exposed shot of higher ISO.
    Michael Lim
    My Flickr Site

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