Check the ISO setting and shoot some tests at ISO 100. If there is still noise, post the samples here with EXIF data attached so people can look at them and get you some advice..
Nothing is enough for the man to whom nothing is enough...
I bought a Canon Rebel XTi and the images have a lot of color noisein them. I tried switching to RAW formatting thinking it was fromjpeg compression, but it is even worse. This is really bothersome.Is this normal, defective, or something I am doing wrong?.
Even DSLRs are not completely noise free, alas..
The XTi/400D can suffer from quite a bit more noise when you switch to RAW. The camera obviously uses quite a bit of noise reduction when converting to jpeg in camera. The easiest trick is to process your RAW files in Canon's Zoombrowser, which I think uses the same noise reduction process as the camera itself..
That way you'll end up with about the same noise you'd get if you'd shot jpeg to start with..
To reduce noise in the first place, do the usual things, like not underexposing, or expecting miracles at ISO1600 in low light!.
You can always use a program like Neat Image to clean things up. Or, if you have Photoshop, colour noise is easy to remove by switching to Lab colour mode and blurring the a and b channels..
The NR reduction works well in DPP..
RAW is less processed than JPG so it's up to you to do noise reduction, sharpening, etc. Noise could be from high ISO, underexposure or unrealistic expectations. Try exposing in raw to move the histogram to the right of center and then adjust back to center in DPP...
Can you post samples with EXIF data?.
RAW cannot be "even worse" if you use ZB to RAW convert. It should be the same...
You all have been very helpful! Thanks... I think it is obvious that some classes are due 8).
How do you reduce noise in DPP? I haven't been able to find that...