Originally posted by mediaslinky Are you using the in camera noise reduction? Or doing something in post?
Or... What is the best way to reduce noise with the K-x and high ISO photography?
I shoot RAW+ so I get to compare the effects of the in-camera noise reduction to RAW all the time.
I have the K-x set to apply NR only above 1600 ISO, and only to apply 'Low' NR. My experience has been that the K-x shoots pretty clean up to 1600 ISO without NR, and that the in-camera noise reduction generally works pretty well up to about 3200 ISO. After that, for best results, out-of-camera RAW post-processing delivers superior results, especially if you shoot right up to 12800 ISO.
Having said that, the acceptability of the K-x JPG output also depends very much on
how you plan to use or present your output. For small prints or web use, for example, JPG's shot at even 12800 and then resized down can look very clean and detailed straight out of camera.
For example, I took the pix below of several local stage performers over a year ago with the K-x, with just the 18-55 kit lens. They illustrate how even extreme K-x high ISO out-of-camera JPG's can look quite OK depending on your output needs. In this format, and for anything up to a 8x10 print probably, the output looks OK. If you zoom to 100% on screen or print out at A3 though, you may see perhaps too much noise and grain.
ISO 6400
ISO 12800