Are there any reasons why an image would be noisy, other than user error (low light, high ISO, slow shutter, etc.)? The reason I ask is because I used to shoot tack sharp, but the last 6 months or so just about all of my images require noise reduction, no matter when or what or how I’m shooting. I’m not a licensed professional but like I said, I feel like my skills have gotten worse and not better. I don’t want to continue to blame myself for it if there’s another reason .