I remember the time when using ISO anywhere over 3200 on my 7D used to give me the heebies jeebies. It's amazing that the 5D3 can churn out such great images at insanely high ISO's.
5D3, 6D, 600D, RX100
16-35L, 24-70L II, 70-200L II, 100-400L, 50L, 85L II, 135L, 24TSE, 40, 100 macro, 18-55 II, 55-250 II, 600RT x 4
I come here to learn something new, not to learn how bad my gear is - I know that already ;-)!