Post by fishguy on Mar 12, 2012 23:31:43 GMT -6
I know what you're saying - and I agree with you. My point was not well made. Of course as the image size is scaled down, the detail is lost - a 2000x1000 pixel image taken down to 20x10 pixel image would be an extreme example. Shrink an image, and the noise will get smaller, too. But in relation to the rest of the detail, it's still the same size and is very noticeable vs. a low-ISO image. You can't hide high ISO noise without compromising some other aspect of the photo.
What I think people on this forum should know is that shooting with a high ISO ("high" being over 400 give-or-take depending on your camera) reduces image quality by adding noise/graininess to your photos. It's a visible difference that you cannot completely hide or correct. If you spent less than $5000 on your camera body, you will be able to easily see the quality difference between ISO 1600 and ISO 200 in all but very small images. If you can get your ISO down in the 400 or below range then your shots will look consistently better, and you won't have to mess with trying to make noise less noticeable. To get ISOs down that low when shooting indoors, you need to throw some additional light around somehow.
(Side note to any of you looking to make your high-ISO images look better. There are tools that cut down image noise - but they usually make an improvement in noise at the cost of adding a little blurriness. Here's a popular one that does a decent job. www.neatimage.com/)
