Snow Geese at 16K

I just returned from Loess Bluffs NWR at Mound City, MO. and was surprised to learn yesterday's count was about 750,000 geese. However, the biggest surprise was quality of images shot at an ISO of 16,000, almost literally shots in the dark. I moved back to Canon after an experiment with Sony and this was its shakedown visit. Both shots recorded using auto focus.

ISO 16,000, 1/8 sec @ f5.6

ISO 16,000, 1/60 sec @ f4.0

LED Light Flicker

I was photographing snow in during very early one morning using a LED flashlight to illuminate the snow. When I reviewed the images several had this pattern. The exposure was 30 seconds and the only explanation I can think of is the light source. Canon advertises that there new 7D will have pulse detection to trigger the shutter during  the brightest light.   It probably won't be effective with a 30 second exposure but at least I know the problem they are trying to correct.