"Shoot Great Video with your Canon DSLR" - Thanks.
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It could be a loose shim on the image sensor's trans-nebulizer - probably caused by the higher than normal gravity we have recently experienced from the "super moon". It should settle back into place in a few days.
Is that a single exposure?
One of the 85 mm prime lenses would be great for both the 7D and a FF. I have the 1.2 and can get some stunning shots - see this candle light photo at a birthday party. I know - the noise is significant, i probably need to work on it a little more . . .
Nice shot (although the axial CA of a fast prime results in the candles showing as purple). Personally, I don't like the noise on the 7D above ISO 800. You can see some big improvements by shooting RAW (if you aren't already) and using something like DxO (which handles noise much better than DPP, I think).
The 85L is a great portrait lens - in fact, I liked the focal length so much for that purpose that when I added a 5DII to my kit, I also added the 135mm f/2L to provide the same focal length and aperture (DoF-wise) of the 85L on a 1.6x crop body. But I still use the 85L a lot on FF.
Although one of the slowest focusing lenses I've owned, it is also the sharpest. For macro at a distance, there is none better than the 180mm macro.