Noiseproblem on EOS40D? [Archive]

Thejo

14-07-2008, 22:44

I love my 40D, but I think there is noise in the pictures very often. Even at 100 ISO. Anyone that have the same problem?

Thejo

Ally

14-07-2008, 22:48

If you shoot RAW then I totally believe you!! when you shoot RAW you get the file with no in camera editing etc Try shooting small jpeg + RAW if you get the chance and you should see the differnce :)

Thejo

14-07-2008, 22:50

Mostly I shoot in large JPEG or large JPEG+RAW

pxl8

14-07-2008, 23:11

Can you post an example and a 100% crop showing the noise?

Thejo

14-07-2008, 23:15

There is a picture in my gallery now, but what do you mean with 100% crop? I am norwegian....

Thejo

hepburn

14-07-2008, 23:21

i think they mean crop a noisy part of the photo but don't resize it. Just make sure it's smaller than 801 pixels to adhere to the forum rules.

Thejo

14-07-2008, 23:29

i think they mean crop a noisy part of the photo but don't resize it. Just make sure it's smaller than 801 pixels to adhere to the forum rules.

OK, thanks! I think that this picture have noise all over! :gag:

pxl8

15-07-2008, 00:09

I see two shots in your gallery but they're far too small to see the noise. Open the original in your editing app and then use the crop tool to select a small section where you think the nosie is. Save the cropped part as a new file and upload it here. Then it should be easier to see what's happening.

Thejo

15-07-2008, 00:29

I see two shots in your gallery but they're far too small to see the noise. Open the original in your editing app and then use the crop tool to select a small section where you think the nosie is. Save the cropped part as a new file and upload it here. Then it should be easier to see what's happening.

I have done that operation on the first picture now. The crop is from the clouds in the sky.

pxl8

15-07-2008, 00:50

Do you shoot raw or jpg?
Is this the image straight out of camera or has it been edited at all?

Thejo

15-07-2008, 10:38

This is a large JPEG out of the camera witout editing.

pxl8

15-07-2008, 11:10

Exif shows a 30 second exposure on that shot. Long exposures will generate more noise as the sensor heats up. There is a camera setting to reducing noise on longer exposures, try turning that on and see if things improve.

michaelgreen78

15-07-2008, 11:48

Understanding Noise (http://ronbigelow.com/articles/noise-1/noise-1.htm)

As pxl8 said, one of the custom functions will turn on long exposure noise reduction which works but doubles the time of your exposure - i.e. a 5 minute exposure will take 10 minutes etc.