Originally Posted by Rix643
But I don't crop (hardly anyway and when I do, it's just very little), I frame tightly (using a higher focal length) and resample (change the image dimensions). When shooting indoors you try to use as many pixels in the final picture as you can to avoid as much noise as possible.
So, it must be the compression from uploading on internet, if not I don't know why but it seems to me that full frame camera (even at ISO 1600) can produce much cleaner images. I wouldn't be surprised if it was like that, for example facebook is using heavy compression on uploaded images.