In response to the two responses regarding my noisy video: This image was intentionally underexposed to check the noise performance in shadow. I sometimes shoot drama, and sometimes even in corporate/industrial shooting I need to deliver a picture this dark.
I shot a video early this week on a white soundstage with products displayed on white columns. When I panned across closeups of the dark product and when talent in dark clothing moved across the frame, you could see (on a large monitor) faint vertical stripes. Everything was properly exposed using Canon 24-105 f4 lens at ISO 320, 30 fps, 1/60 shutter. When I look at pans or movement across the frame, it almost looks like I have some a filter in that is producing subtle vertical stripes. And, yes, I've removed the low-priced protective glass and experimented with faster, sharper lenses.
The still sample still was shot at 640 ISO 30 fps, 1/30 shutter. 320, 640 and 1250 are the sweet spots for low noise with this chip. ISO below 320 doesn't help, although ISOs above 1250 do exacerbate the problem.
Thanks again for your input.