Noisy photos - A reoccuring issue

Hello everyone!

I took some photos of fireworks today and I noticed that several of my shots have this terrible noise in them. I've had this issue before and I'm having it again and it worries me. I'm hoping to get some feedback from anyone who may know what could be causing this noise issue and whether or not I can fix it or my camera needs to be checked out by Canon. I'm posting some example images I took earlier this evening.

Photo 1 - This has noticeable noise, especially on the right half of the photo. It is more noticeable than what was shot in Photo 3

https://webfiles.berke​ley.edu …/public_html/IM​G_5283.jpg

Photo 2 - This has extreme noise! This has been a result I've been getting often (too often, in my opinion...this kind of noisy photo shouldn't be at iso 100) during shoots.

https://webfiles.berke​ley.edu …/public_html/IM​G_5293.jpg

Photo 3 - This seems like a standard ISO 100 exposure. Very little noise.

https://webfiles.berke​ley.edu …/public_html/IM​G_5282.jpg

Hopefully someone will have some insight into this issue.

Thank you!

what camera?

Did you shoot these RAW? If so, have you tried adjusting them in Photoshop? Sometimes the 'auto' settings in photoshop will WAY over-adjust the exposure... Try adjusting the exposure and contrast.

XT

braduardo wrote:
Did you shoot these RAW? If so, have you tried adjusting them in Photoshop? Sometimes the 'auto' settings in photoshop will WAY over-adjust the exposure... Try adjusting the exposure and contrast.

Here's one of mine from tonight with just those 2 adjustments.

EDIT If you are shooting in one of the Automatic Modes (ie, action, portrait, landscape, etc) you might want to shoot RAW format next time because it will let you choose the settings rather than letting the camera guess.

This noise issue cannot be fixed in photoshop. The noise of photo 2 is irrepairable.

Is this jpg straight out of the camera? Or is it a CR2 file processed in PS? If processed in PS: What settings? If straight out of the camera: Call Canon.

That doesn't really look like 'noise' to me...

What it looks like to me is over compensated exposure. What I mean is that when the camera or your computer automatically decides what adjustments the image needs before it saves it in JPEG, sometimes in a dark picture it will try to adjust the exposure WAY up to basically make it look like normal daylight. When that happens, you end up with the entire picture looking too bright. That is what number 2 looks like to me.

If you have it in RAW format, try adjusting it in the PS Raw utility. Look to see if under "Exposure" it has it pushed over to +2.00 or more. If so, that is probably your problem. With some tweaking of the exposure and contrast, and maybe color temp. you can save the picture.

If the image is saved in JPEG, you might be pretty much screwed. There are noise reduction programs out there, and maybe you'll get some help on those from someone else, because I don't know anything about them.

This is a CR2 coverted to JPG in ACR. ACR applied default "auto" settings.

You were correct. I was being oblivious and just double checked and saw that my exposure was like +2 or higher and after fixing that the noise issue went away.

Thanks for your help!

That's most likely your problem then... The "auto" settings aren't always the "right" settings. One of the biggest advantages to shooting RAW is that it puts the control into your hands, rather than letting your camera or computer try to guess what effect you are looking for.

I wouldn't trust the "auto" setting for any of my pictures just because it's "auto". As you process them, take a few seconds to tweak it from the auto settings to the settings that YOU want. You'll probably be a lot more happy with your pictures.

Oops... You got in there before me... Glad you got it all figured out... Hope you have better luck.

I got same Noisy problem with my XT even i got decent lenses, i hope that i am wrong that could the XT is not much good as another cameras in Noise reduction, if so then it is 100% i have to buy another. Correct me please

the 350d is a great camera regarding noise, its probably your technique.

Always shooting in RAW, and even with alot of different RAW processing settings i can't get good results (i talk about night shots, and very rarely daylight shots).

and this pic is a sample of what i talk about:

http://img140.imagesha​ck.us/img140/4151/bird​10kp.jpg

I know and i got very good shots, but what is the problem of getting noise if doing good in settings.