40D Noise

I have only used my new 40D a couple of times and working on some pictures I took of butterflies.

When in CS3 they seem to have a lot of noise to me. They were in the shade, but shot at ISO 100-200. Not sure why they would have so much noise. I have not noticed this on my 20D. But maybe just not in same situation.

Any input would be good.

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I'm not a pro or anything but I don't see any noise. I see what looks to be artifacts from blowing the image up so much or poor compression while saving. 100% crop would be nice.

Me neither...no noise visible on my screen. Just bad IQ.

I can't see any noise either - as Emberghost says, processing artifacts/enlargement pixelation - but no noise.

Do you have automatic setting on in CS3? If the images are badly underexposed then there is a high likelihood that the software is brightening them, bringing the noise out. An ISO 200 image that has to be heavily adjusted will reveal a lot of noise.

Emberghost wrote in post #4076927
I'm not a pro or anything but I don't see any noise. I see what looks to be artifacts from blowing the image up so much or poor compression while saving. 100% crop would be nice.

I am new at this and want to make sure I uderstand your comments.
What do you mean by artifacts blowing the image up. I have not enlarged the image at all

canon shooter wrote in post #4077048
I am new at this and want to make sure I uderstand your comments.
What do you mean by artifacts blowing the image up. I have not enlarged the image at all

I think the question is what have you done to the image to put it on the web?

Is this a crop of the original image? If so to what %
Checked the EXIF and given the iso (100), shutter speed and apeture these are not likely to be the cause of your problem.

I really don't understand what is going on in the OP's photo but noise is the least of the problems with that image.

Here is an example of the sort of image I would expect to see. This is a 100% crop from a photo taken with my 40Dand 100-400 lens at 400mm, 800 ISO, f/5.6, and 1/400. This was hand held at around 20' or so from the subject.

I know this has no merit as a photograph - I just fired off a quick test shot for AF testing since I'd been playing around with this lens and my 1.4X teleconverter the day before and I wanted to see how the bare lens did.

It was shot in raw and processed to jpeg using DPP. Editing was to set picture style = standard, sharpness = 3 and to crop to 540*360. I left noise reduction turned off.

I've also attached the original full image, resized to match the crop.

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If that's not an enlargement or resizing of any kind, then there's something seriously going on with your workflow.

Pics like that that get a good camera a bad name, i would shoot something else and try again.

I'd be complaining about why my picture isn't in focus or what you're doing wrong in those terms. Like the others said there are NO noise issues with the image posted.

I think I may have found the answer to my own question.

I looked at some ports that I took yesterday with 70-200. And seeing some of the same results in a FEW. And I think I have narrowed it down to being camera movement.

Anyone think that assupmtion could be correct.

Yeah -

Something doesn't add up with the picture posted in the first post. The EXIF data is...

ISO = 100 - there shouldn't really be any noise unless massively underexposed and then boosted in PP.
FL = 188mm
Tv = 1/320
Av = f/4.0
EC = +2.0 !!!!!!!!!!

The shutter speed is fast enough (1/320) to suggest camera shake is not an issue with a 188mm focal length. But why is the EV set to +2.0? There is nothing in the image posted to explain the need for +2.0 EC yet the picture is not overexposed. So it seems we are looking at a cropped image, sized to 800*533. The questions are....

- Was the image cropped to exactly 800*533 before being output from Photoshop, or was it possibly cropped to something less and then inadvertently upsized to 800*533, leading to the poor IQ?
- What does the whole, original, uncropped image look like?
- Are we actually seeing a crop from the part of the image that was supposed to have been focused?
- Maybe the camera to subject distance did change between setting focus and taking the shot, but only the OP can know. Since I don't believe we are seeing the full original picture and the IQ is shot to pieces it is hard to know what was going on.
- Was this shot in raw and then processed to a cropped/resized jpeg or was this shot in jpeg to begin with?
- If shot in jpeg to begin with, what were the camera settings (picture style, sharpness etc.?)
- What processing was performed in Photoshop?

Maybe some more background from the OP or a reshot/reprocessed picture might help. Either way, at 100 ISO I don't really see that noise should be the issue for discussion here.

EDIT : By the way, the colour space setting for the jpeg is Adobe RGB. It should be sRGB for the web.