Underexposure and correction in conversion always results in severe noise. Don't kow why. But I know it happens, so I avoid it. And yes there is some noise reduction logic applied to high ISO images in the K20D. You are able to choose a level. I have mine set to "weak," I believe. However, the camera defaults to "strong" at ISO 6400. So 6400 images are somewhat lacking in detail, but where that much speed is necessary, they're better than no image. Here's a 6400 pic that I shot when I first bought the camera. The only light is from a television screen across the room. Haven't really used that high an ISO since then. http://photo.net/photodb/photo?photo_id=7006983&size=lg
-------------- Original message ---------------------- From: Toralf Lund <[EMAIL PROTECTED]> > Paul Stenquist wrote: > > No, it's not the result of image processing you could apply in > > PhotoShop. I shoot only RAW. The RAW data is far superior. > Isn't some of the "noise reduction" logic applied even in "raw" mode? > > It's > > apparently the result of a sensor that generates less heat at high > > ISO than the K10D sensor. > > > You mean, the gain circuits generate add more noise due to increased > heat at high ISO settings? And this is less of a problem in the newer > bodies? > > But if this is the case, wouldn't you get better results with the older > bodies by underexposing at a lower and then correcting the output? > > - T > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
