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Thread: Why are my shots noisy even with low ISO?

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    Default Why are my shots noisy even with low ISO?

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    Why are my shots so noisy even with low ISO?

    Tokina 11-16 with EOS450D
    Manfrotto Tripod
    UV Fliter

    Shots taken normally from F13-F16 and a few F22s, ISO 200, Shutter speeds 10-30seconds, No Flash.

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    Senior Member bonrya's Avatar
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    Quote Originally Posted by Shonn
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    Why are my shots so noisy even with low ISO?

    Tokina 11-16 with EOS450D
    Manfrotto Tripod
    UV Fliter

    Shots taken normally from F13-F16 and a few F22s, ISO 200, Shutter speeds 10-30seconds, No Flash.
    I'm getting that with my tokina as well. Find that the problem isnt as bad when I remove the filter (any that I'm using) as well as use a bigger aperture. (not sure which of the two causes it, but worth a try as well) also using on a canon.
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    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by bonrya View Post
    I'm getting that with my tokina as well. Find that the problem isnt as bad when I remove the filter (any that I'm using) as well as use a bigger aperture. (not sure which of the two causes it, but worth a try as well) also using on a canon.

    But I read that if the aperture is above the "sweet spot" of f13-f16, like f22, the photos will not be as sharp.. Right??

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    Senior Member bonrya's Avatar
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    Quote Originally Posted by Shonn

    But I read that if the aperture is above the "sweet spot" of f13-f16, like f22, the photos will not be as sharp.. Right??
    Where did you read this?

    Btw when I said bigger aperture I meant bigger compared to the f22 you're using now. E.g. F8-16

    You may also want to find a way to cover your view finder from preventing light from entering through it..
    Last edited by bonrya; 25th May 2011 at 11:50 PM.
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  5. #5

    Default Re: Why are my shots noisy even with low ISO?

    there is also noise from long exposures...

  6. #6

    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by Shonn View Post
    But I read that if the aperture is above the "sweet spot" of f13-f16, like f22, the photos will not be as sharp.. Right??
    Correct. I do not believe it's a lens issue.

    What I think is happening is sensor heat - you are doing a long exposure, thus the sensor heats up. Don't forget that the 450D is now an "older" generation sensor - newer generations have less heat output. With the bright lights and dark sky in your shots, the metering will also try to expose the bright areas correctly, thus resulting in a push in the dark sections - causing noise.
    Alpha

  7. #7

    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by bonrya View Post
    Where did you read this?
    It's called diffraction. He's right.
    Alpha

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    Moderator catchlights's Avatar
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    Default Re: Why are my shots noisy even with low ISO?

    long exposure
    underexposed
    Shoot to Live, Live to Shoot
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    Senior Member bonrya's Avatar
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    Quote Originally Posted by Rashkae

    It's called diffraction. He's right.
    I'd like to read that article too since I'm still a noob.. Thanks uncle Rashkae!
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  10. #10

    Default Re: Why are my shots noisy even with low ISO?

    It's not the lens.
    I'm using the same lens and i don't have such problems. In fact, this lens is one of the sharpest and cleanest ones i've seen..i really love this lens.
    I've done 10s all the way to 4min exposures on it and no such issues..
    Most likely is the sensor getting too hot..give it a rest in between shots and see if it's better? Some of your shots don't have that problem i see..

  11. #11

    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by bonrya View Post
    I'd like to read that article too since I'm still a noob.. Thanks uncle Rashkae!

    here's one.

    http://www.luminous-landscape.com/tu...fraction.shtml

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    Senior Member bonrya's Avatar
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    Quote Originally Posted by kei1309
    Thanks er. Keiko chan!
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    Default Re: Why are my shots noisy even with low ISO?

    Thanks to all of you. That's actually my 2nd attempt and maybe it's my sensor... I tend to take test shots before long exposures and it's hot and humid and I have no patience haha.


    Yes that lens is amazingly sharp! and I never go to F22.. I only reach up to F16 MAX!

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    Default Re: Why are my shots noisy even with low ISO?

    my friend edited the photo.. with colourefexpro... managed to...

    turn this....

    into this...



    seems like i have alot to learn..
    Last edited by Shonn; 26th May 2011 at 12:23 AM.

  15. #15

    Default Re: Why are my shots noisy even with low ISO?

    noise reduction and some sharpening.

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    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by Shonn View Post
    my friend edited the photo.. with colourefexpro... managed to...

    turn this....
    into this...


    seems like i have alot to learn..
    I actually seem to like the original one better. Noise made the shot look more rugged and gives texture.

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    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by symmetrix View Post
    I actually seem to like the original one better. Noise made the shot look more rugged and gives texture.
    yeah~ but you won't want a background wallpaper with noise haha

  18. #18

    Default Re: Why are my shots noisy even with low ISO?

    Quote Originally Posted by catchlights View Post
    long exposure
    underexposed
    + 1

    Pollution

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    Senior Member edutilos-'s Avatar
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    Default Re: Why are my shots noisy even with low ISO?

    You should keep it at base ISO and do a 1 minute exposure.

    And I can't see your pictures, so I couldn't say for sure, but if you are using ISO200, you should dial it down to base ISO100. Everytime you raise the ISO, the happier the noise in long exposure becomes.

    Don't believe, try ISO400, stop down and do 30 seconds. Confirm you see stars everywhere.
    Last edited by edutilos-; 26th May 2011 at 01:20 PM.

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    The base ISO for 450D is 100? Nice... Most previous gen nikon's base ISO are 200.
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