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Sure it does...since noise limits detail.Noise will not limit print size.
That makes no difference in print size. Images don't change because of size--there is no change in the information that is contained in them. The noise won't increase nor decrease.Sure it does...since noise limits detail.
A photo from an M9 at ISO 160 will hold up better when printing at larger sizes than at ISO 2500. The noise does not increase in volume (but will in size just as grain does), but the increase in noise at 2500 (as compared to 160) will not hold the same amount of detail as the ISO 160 photo. So there is always a change in the amount of detail and dynamic range the further you go away from the native ISO. Have you printed photos from an M9 at 160 and at 2500 in large sizes (say 13x19 or larger)? I have and the 160 ones hold up a lot better generally speaking.That makes no difference in print size. Images don't change because of size--there is no change in the information that is contained in them. The noise won't increase nor decrease.
I agree.Viewing distance is equal to the diagonal of the image. As the image size changes, so does the viewing distance. This is a relative problem, not an absolute one.
I never said it would...ISO 160 images will have less noise. ISO 2500 images will have more noise. Print size will not change that.
I can understand that. My line of thinking is that there will be more detail in a ISO 160 print than a ISO 2500 print of the same size...so sticklers for IQ may not like what they see in a large print at ISO 2500. Of course, people have made billboards with older digital cameras with only a few megapixels so it can be done (and done well enough). It just depends on your expectations is what I meant.Sorry, not being clear. Noise is just the result of the process and will be inherent in the image. At a standard viewing distance, it will be just as obvious regardless of print size. I print all kinds of images on 44" large-format printers. Quite a few of my "clients" come in saying a particular image can only be such and such a size because of pixels/noise/the force/etc. I have yet to have anyone leave believing an image is limited to a particular print size.