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06/26/2005 04:09:38 PM · #1 |
i recently started shooting RAW, and ive been shooting in the studio lately and i notice ALL my pictures are noisy at 100%, and yes im on iso 100
i dont know if its RAW or the color conversion when you open it in photoshop
but whats the deal?
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06/26/2005 04:29:15 PM · #2 |
When you're shooting JPG do you have the camera set to perform in-camera noise reduction? That's all I can think of coz we've never found RAWs noiser than JPEGS.
I suggest you set your camera up with tripod and then take the exact same picture once as a JPEG and once as a RAW file so that it's a direct comparison.
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06/26/2005 04:36:30 PM · #3 |
could it be when yuo adjust the exposure and the brightness ect in photoshop that it makes it noisier?
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06/26/2005 04:58:00 PM · #4 |
Not unless you're adjusting them one heck of a lot...
If you're just adjusting exposure by half a stop or less, it shouldn't introduce lots of noise. If you're consistently adjusting it by more than that you need to review the exposure settings you're using in the first place when you take the image and get them closer to what you're after in the first place.
All JPG does is take the exact same data that is captured and apply whatever in-camera settings you have selected to it (WB, sharpening etc) before saving it using the appropriate compression.
RAW takes the same exact data and saves it as is, without actually applying any settings to it, not even white balance, though it makes a note of your WB settings.
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06/27/2005 11:50:37 AM · #5 |
Fetor,
Shooting in RAW shouldn't cause more noise than shooting JPEG.
It should, in theory, cause less noise b/c you are working with more data from the sensor instead of having less data that the imaging software in the camera has eliminated the when it converted the image to a JPEG format.
I'd consider other factors first before considering the RAW format.
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06/29/2005 10:49:06 AM · #6 |
It is not the RAW. You really shouldn't have any noise at 100 ISO with your camera. Do you have any samples you could show?
You could always invest in Neat Image or Noise Ninja too.
But if you are shooting at 100 and you are getting a lot of noise there is probably a problem somewhere either hardware or software.
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06/29/2005 03:19:26 PM · #7 |
Originally posted by Kavey:
When you're shooting JPG do you have the camera set to perform in-camera noise reduction? |
the 20D's long-exposure noise reduction feature only works for 1 second or longer exposures, and uses dark-frame subtraction to get rid of hot pixels, not ordinary cmos noise.
Originally posted by yido:
It should, in theory, cause less noise b/c you are working with more data from the sensor instead of having less data that the imaging software in the camera has eliminated the when it converted the image to a JPEG format. |
Noise IS more data. The noise comes from the sensor, so when you record what comes out in more detail, more noise will be evident, this is the nature of it. Less noise means smoother image, less to encode to jpeg. However, to lose any noticeable amount of noise you'd have to compress the jpeg pretty heavily. Unless you're not shooting at largest, fine jpeg setting, this is not a likely cause.
Message edited by author 2005-06-29 15:19:53.
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