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  1. #1
    RichA's Avatar
    RichA Guest

    Default digital camera noise



    I've got an Olympus C-3040 and if I set it at 400 iso
    and let it expose for 16 seconds, it shows considerable noise.
    So, I put it in the fridge for a couple hours,
    chilled it to 35 deg. F, and took the same shot. Voila, no
    noise at all. Of course, I didn't leave the batteries in it
    when it was in the fridge.

    I'm looking at getting a digital SLR and from the reviews on
    dpreview.com, it's pretty clear that Fuji's S2 is far and
    away the least noisy of all the digital SLRs.
    -Rich

  2. #2
    Jon Isaacs's Avatar
    Jon Isaacs Guest

    Default digital camera noise

    >I've got an Olympus C-3040 and if I set it at 400 iso

    Does the Olympus 3040 have "noise reduction." My C-3000 (may it rest in peace)
    did not. This is essentially dark frame subtraction which is something you can
    do yourself. Just take your picture, save it in an uncompressed format
    (tiff/raw), then take identical picture immediately afterwards with the lens
    covered. At home subtract the second from the first...

    I would be cautious about believing dpreview.com when it comes to
    astrophotography stuff......

    The DSLR's that seem to be the best/most popular are the Cannon's.....

    jon


  3. #3
    HAVRILIAK's Avatar
    HAVRILIAK Guest

    Default digital camera noise

    >o, I put it in the fridge for a couple hours,

    Its the time of the year when night time temperatures reach 35 deg. F often so
    your in luck.

  4. #4
    Dan Mckenna's Avatar
    Dan Mckenna Guest

    Default digital camera noise

    Be careful ! you might get condensation on the inside of your camera and
    the ccd

    Dan

    RichA wrote:

  5. #5
    RichA's Avatar
    RichA Guest

    Default digital camera noise

    On 08 Nov 2004 20:53:18 GMT, jonisaacs@aol.com (Jon Isaacs) wrote:


    No, it doesn't have noise reduction. Also, each time a frame is shot,
    the noise effects a different bunch of pixels, even though overall
    noise is still about the same.

    Well, I figured that was because Canon's Rebel was one of the first to
    crack the $1000 price barrier and Canon and Nikon are by far (in the
    U.S.) the most used photo and DSLRs.


  6. #6
    RichA's Avatar
    RichA Guest

    Default digital camera noise

    On 08 Nov 2004 21:56:33 GMT, havriliak@aol.com (HAVRILIAK) wrote:


    Nature's build-in peltier!


  7. #7
    RichA's Avatar
    RichA Guest

    Default digital camera noise

    On Mon, 08 Nov 2004 15:24:40 -0700, Dan Mckenna
    <dmckenna@as.arizona.edu> wrote:


    Yes, I've heard that is a possibility. Not quite as versatile as
    the old OM-1 that would function even when batteries died.


  8. #8
    Randy L.'s Avatar
    Randy L. Guest

    Default digital camera noise

    Rich,
    I just purchased an Olympus E-1 digital SLR. It has a Noise Reduction
    feature for exposures in low light conditions, a manual bulb shutter time of
    up to 8 minutes, and with ISO Boost turned on, ISO can be set all the way up
    to 3200. I haven't tried any of these features out yet, but intend to
    tonight as I am hoping to use it to take some aurora pictures. It is an
    expensive camera, but so far the pictures that I have took during the day
    look incredible. It's a camera that you might like to check out.

    Randy L.

    "RichA" <none@none.com> wrote in message
    news:5lkvo0p3ems4ek0itqvk4m8jqnnkn1tc3j@4ax.com...



  9. #9
    Canopus's Avatar
    Canopus Guest

    Default digital camera noise

    RichA <none@none.com> wrote in message news:<5lkvo0p3ems4ek0itqvk4m8jqnnkn1tc3j@4ax.com>. ..

    See 10 picture series of digital camera noise where the author reduces
    digital camera noise by chilling the camera in:

    Edwin L. Aguirre, Deep-Sky Imaging with Digital Cameras, Sky &
    Telescope, online article
    << http://skyandtelescope.com/howto/ima...icle_953_2.asp accessed
    11/2004 >>

    "Kovacsy's first image, at an ambient temperature of 66° F, is nearly
    free of noise. The 10th consecutive image is the worst. Turning off
    the camera for 10 minutes produced an image as clean as the very first
    one in the series. Note how the 10th image taken at 40° F ambient
    temperature has less noise than the second image taken at 66° F," he
    adds. 'Based on my trials, temperatures of 32° F or below work best
    when taking minute-long exposures with the Coolpix 995.'"

    This is similar to the digital camera noise problem that Tony Flanders
    encountered when trying to use a digital camera as an inexpensive
    light meter to measure sky brightness. See his Usenet message and
    thread:

    Re: Digital Camera as Sky Meter -- Ongoing Report
    Newsgroups: sci.astro.amateur
    Date: 2004-09-06 17:13:47 PST
    <958c21.0409061613.2093658d@posting.google.com>

  10. #10
    RichA's Avatar
    RichA Guest

    Default digital camera noise

    On Mon, 8 Nov 2004 18:53:34 -0700, "Randy L."
    <rlink"nospam"@cableone.net> wrote:


    One problem. I don't think they make an adapter ring for it to attach
    to a telescope yet. I know one person who has one and they are
    having/can't get a ring from Olympus for this.


 

 
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