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#1
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Noise after long exposure
Hi all, I own a Canon 300D and last week I tried some night photographing in the city(which turned out great). No problem so far. But yesterday I took some photos during daylight and these where all filled with noise! It seems like strokes of colored noise is on every photo. Also shadow are pixelated. On the link below I have a sample of a photo I took (RAW): http://www.swind.nl/plant.jpg What can I do to make this noise go away? Can somebody help me? tia, Sander -- swind ------------------------------------------------------------------------ View this thread: http://www.photographytalk.net/viewtopic-167497.html Send from http://www.photographytalk.net |
#2
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Noise after long exposure
swind skrev:
Hi all, I own a Canon 300D and last week I tried some night photographing in the city(which turned out great). No problem so far. But yesterday I took some photos during daylight and these where all filled with noise! It seems like strokes of colored noise is on every photo. Also shadow are pixelated. On the link below I have a sample of a photo I took (RAW): http://www.swind.nl/plant.jpg What can I do to make this noise go away? Can somebody help me? tia, Sander Underexposure or too high iso -- Med venlig hilsen, Ole Larsen. New Images And Design 2005-11-17 http://home.tiscali.dk/muggler |
#3
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Noise after long exposure
swind wrote:
I own a Canon 300D and last week I tried some night photographing in the city(which turned out great). No problem so far. But yesterday I took some photos during daylight and these where all filled with noise! It seems like strokes of colored noise is on every photo. Also shadow are pixelated. On the link below I have a sample of a photo I took (RAW): http://www.swind.nl/plant.jpg What can I do to make this noise go away? Can somebody help me? You left the camera set to ISO 1600. -- Ray Fischer |
#4
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Noise after long exposure
"John A. Stovall" wrote in message ... On Sat, 31 Dec 2005 11:28:49 +0100, swind wrote: Hi all, I own a Canon 300D and last week I tried some night photographing in the city(which turned out great). No problem so far. But yesterday I took some photos during daylight and these where all filled with noise! It seems like strokes of colored noise is on every photo. Also shadow are pixelated. On the link below I have a sample of a photo I took (RAW): http://www.swind.nl/plant.jpg How can it be a RAW when it's a jpeg? It's becoming fashionable to convert RAW files into jpg's...........(wise people use Silkypix for that very purpose - but that's another story) |
#5
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Noise after long exposure
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#6
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Noise after long exposure
John A. Stovall wrote:
PSD is a better format for converting RAW into than a jpeg. Depends on what you are going to do with the file after converting it. If you are going to edit then clearly PSD is what you would want to convert to. But if you are going to print right from the converted image then jpeg could be the way to go. When I make prints I up load my files to Costco and have them print them, The PSD file will give me not better print then what I get from a jpg copy. The image that the OP posted the noise was clear enough that a psd file would not have added much. The raw file would have been more useful since the noise in the final image depends a lot of the settings during the conversion, but not everyone has high speed internet. The exif data what is really needed, but that data is missing from the photo. Scott |
#7
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Noise after long exposure
John A. Stovall wrote:
Oh, I never print from a jpg but directly from CS2 with 16bit images in ProPhoto color space. Why would you want to reduce your color gamut to 8bits? I just guess we have different standards of quality in our work. I only bother with 16 bit if I'm going to apply curves or other adjustments. Then I change to 8 bit jpeg & archive the raw file. |
#8
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Noise after long exposure
On Sat, 31 Dec 2005 11:28:49 +0100, swind
wrote: Hi all, I own a Canon 300D and last week I tried some night photographing in the city(which turned out great). No problem so far. But yesterday I took some photos during daylight and these where all filled with noise! It seems like strokes of colored noise is on every photo. Also shadow are pixelated. On the link below I have a sample of a photo I took (RAW): http://www.swind.nl/plant.jpg What can I do to make this noise go away? Can somebody help me? tia, Sander You can do few things: 1. Make sure your ISO settings are not being randomly chosen by the camera. Use ISOs below 400. 2. Make sure the exposure is correct, and that the image doesn't have large areas of underexpsure. In other words, expose for the darker areas to bring out shadow detail without of course exposing so much that lighter areas get "burned out." 3. Use a good noise reduction program like "Neat Image" and experiment with it to determine what gets rid of any noise without sacrificing image detail and tonality. 4. Use JPEG in-camera if you want to reduce noise in-camera as cameras incorporate some level of noise reduction in JPEG modes. However, this reduces dynamic range. 5. Use as fast a lens opening as possible to avoid any long exposures. Exposures longer than 1 second generate electronic noise. |
#9
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Noise after long exposure
John A. Stovall wrote:
Oh, I never print from a jpg but directly from CS2 with 16bit images in ProPhoto color space. Why would you want to reduce your color gamut to 8bits? I just guess we have different standards of quality in our work. You would never see the difference between a print made from 8 bit/ color and 16/color. If you are going to adjust the photo then 16 bits makes sense otherwise you are not getting any extra quality in your prints from the 16 bit. BTW 8 bits does not reduce the color gamut, it just changes the granularity. Scott |
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