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Thread: stealth night shots

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    21st century digital boy noah's Avatar
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    stealth night shots

    got a few shots on a stealth mission to tintern abbey last friday. not a blade of grass was harmed, but we did get nice and close.







    i think this is my favorite one


    edit: forgot to mention the massive increase in noise when shooting for 30secs and longer, i had no idea it got as bad as it does!
    Last edited by noah; 20-02-2006 at 09:50 PM.

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    Wow, great pictures.

    What noise do you mean?.



    Very nice lighting too, you must of used a very bright light or flash?

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    I eats food da_ging's Avatar
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    Quote Originally Posted by noahhowes
    edit: forgot to mention the massive increase in noise when shooting for 30secs and longer, i had no idea it got as bad as it does!
    didnt you switch on long exposure noise reduction?

    nice pics , like the second 1 most

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    Does he need a reason? Funkstar's Avatar
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    very dramatic shots. nice

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    21st century digital boy noah's Avatar
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    thanks guys.

    these were all taken under the minimal lighting on the building and the moonlight. the first was over 1 min exp, others were less. no flashes used.

    you cant see the noise in the first one as it has quite drastic NR already done on it. if you look closely at the sky on the 3rd you can see some horizontal bands (no my d70 doesnt have banding issues you band lovers) of noise running across the sky. and no i forgot to turn on longg exp NR, oops.

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    what iso did you use as i would not have expected much noise even at 30 secs unless you used iso 800 or 1600, hot pixels yes but not bad noise

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    21st century digital boy noah's Avatar
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    iso 200. you do get noise with long exposures on all digicams as far as i'm aware, im not sure if this is to do with the hot pixels but i guess it is. i remember hearing something to do with the wells filling up in the sensor, but i only vaguely remember. i had a chat with hoodi last night about it as he finds it on some of his long exposure IR shots. i might try a black shot with my lens cap on at the same iso and aperture and shutter and then to subtract the constant noise, not entirely sure how to do it, but i know its poss.

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    Dianeal/Extraneal/Physioneal hoodmeister's Avatar
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    Quote Originally Posted by noahhowes
    i might try a black shot with my lens cap on at the same iso and aperture and shutter and then to subtract the constant noise, not entirely sure how to do it, but i know its poss.
    Easy! This is what "Long Exposure NR" does

    Lets say you take a 30 second exp.
    Once that is done the camera will take another 30 second exp. - but with the mirror down. Any information in the second exposure is then extracted from the first - and et voila, less noise!

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