August 15, 2015 at 3:19AM
A7rii Overheating Issue - Improvements
I may not have entirely solved the overheating issue, but I think I found a way to make it last long enough for me: just turn off the LCD.
The first video I've been shooting with the camera is just testing the overheating...I need to know if it can handle wedding ceremonies, especially outdoors. So I flipped the camera on, pushed record (4k 100mbps, FF mode) and it goes all the way 30 minutes (actually 29:50 or so). I start it up again in FF mode and get maybe another 15 or so, then switch to Super 35, get like 5 minutes, then decide to cover up the EVF to switch off the LCD. Now I get 10 minutes. Go again and I get a full 30 minutes again.
I can't imagine it's random or coincidence. The test was conducted in my room, which is maybe 74 degrees, so it's not too hot. I'll try to test it again maybe tomorrow starting by turning off the LCD and see how long I can run it for. I'll have to do another test outside as well. Just wanted to share my findings and perhaps offer a solution that others can test.
I also want to point out that I occasionally turned the LCD back on to "check" my shot just like I would if I were actually shooting. I switched the battery and the memory card (maybe a few minute break), switched the camera on one more time in Super 35 mode, and got about 5 minutes before overheating again. IBIS was on during the whole test--not sure if that's a factor or not.
Moral of the story:
1. Super 35 mode generates a lot of heat, avoid it for long takes if you can.
2. Pull the LCD away from the body and turn it off if you can afford to.
Other potential things to help would be turn camera on airplane mode and turn off IBIS.
Again, I'll try testing again soon and see just how long I can get it to go.