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I have a custom video mode defined and saved on Custom Mode 3 so that I can just push the red Movie Shooting button on the top of the R5 and instantly switch from shooting stills to shooting video. What I can't find explained is once I start shooting...

I know there is a lot of discussion about the R5 overheating in video mode but I just tried my first test of taking stills and video at my grandson's soccer game today. The 2nd half was barely underway and I was already getting overheating warnings. ...

I am trying to understand manual mode on my 580EX II flash.  I use this with a 5D Mark III.1. In M mode, I can set the power rating from 1/1 to 1/128.2. In Ext M mode, I see the ISO and F-stop and effective flash range.3. In reading Bryan Peterson's ...