Originally posted by Cynog Ap Brychan Am I the only person who doesn't give a fig at what pictures (from any camera) look like at 12,800 ISO? I've never used it, and never will. I know that it's important to some, but am I really in a minority of one?
I've taken dozens at ISO 12,800 this year with my K-5IIs. Hand-held shots inside museums, inside aircraft, and a few (failed) birds in flight. (I haven't taken any at higher ISO than that).
Some of these are very acceptable. With care in Lightroom, they are sharp and with acceptable noise (rather than objectionable or intrusive noise). Typical Lightroom parameters might use: Noise reduction - Luminance 50, Color 25; and Sharpening with Masking 80 or more to avoid sharpening noise in smooth surfaces.
I mostly keep below ISO 6400, but it is useful to have higher ISOs available as an option. I would probably sometimes use higher ISOs than 12,800 if I were confident that I could keep noise under control in an A3+ print. But I probably need more practice first.