Quote Originally Posted by Ron Kruger
Listen, you guys rule the roost here, so if I'm stepping on your attention toes, I'll bow out.
Hey Ron, I don't think anyone's trying to offend here. I know I certainly don't want anyone to "bow out". You may have uncovered a flaw in Pentax's IS system.

From my point of view, I don't want the concept of IS being a bad thing being put out there based on isolated or inaccurate results. There are a lot of folks here who are newbies, and if they get the idea that IS is a bad thing, and turn it off because someone in a forum said it affected hue, saturation, and noise in their camera.....well.....I can't really sit back and ignore that. Perhaps Pentax has a flawed system if you're seeing it, but I guarantee you that Canon and Nikon do not have that issue. To me, IS is one of the best inventions in photography ever. And it's improving more and more. There are isolated instances where it may be counter productive, but the goods outweigh the bads BY FAR.

I suggest you lock your camera in manual mode, and redo your tests with the same manual settings in both IS on and IS off modes. Use the same subject, same light, and post the unmodified pics with Exif intact. THEN I'll buy that hue, saturation, and noise are affected in your camera with IS on or off.

You'll have to excuse me if I seem like I'm coming on a bit strong here, but I'm an Engineer by trade....so I always ask questions when things like this are presented. I am having trouble understanding how a purely mechanical function that has no bearing on exposure settings can have an effect on color and noise level. That's all.

Again, there is absolutely no intention of offending here. You may well be onto something that is either Pentax or "in camera" IS specific.

-CB