[A7RII] overheats in HD?

D

den59

Well-known member
we all know by now that a7rII can overheat when shooting internal 4K.
Any overheating when shooting 1080p?

p.s. as far as I see on these forums, a7s did not overheat.
Very likely a7rii shall not overheat in 1080p either.
 
Not many testers reports on that as the 1080p is markedly inferior to the a7s 1080p so 4K is the one being tested and tortured.

However, Sony's rarely overheat recording in 1080p (a6000,a7,a7r,nex), a tiny bit more incidents than bigger DSLRs but rare,

So It's probably 95% no issue in 1080p.

But again I'd use the a7s if I wanted 1080p, a much better image

(perhaps if I need the 42mp stills and OK HD then it's viable otherwise not really a good option)
 
For what is worth, I had my A7S run for about 5 hours straight when I got it just to see if there will be any issues with overheating or battery life. It worked like a champ and other than darning batteries like there is no tomorrow I didn't notice any other issues.
 
Ebrahim Saadawi said:
Not many testers reports on that as the 1080p is markedly inferior to the a7s 1080p so 4K is the one being tested and tortured.

However, Sony's rarely overheat recording in 1080p (a6000,a7,a7r,nex), a tiny bit more incidents than bigger DSLRs but rare,
Click to expand...

Uhm, my NEX-5n overheated like crazy shooting 1080p60. Same with the NEX7 and RX100 (v1) I had. Certainly not rare at all. This has always been a known issue with the NEX bodies. Now, the a7s never did and I highly doubt the a7rii would in 1080p mode. I can't believe you don't remember of all the NEX-5n and NEX-7 reports of overheating...
 
Was there ever any mention of overheating by Sony when this was released? In fine print or any other format? I get it's a bigger sensor being pushed to it's limits and all, but how disheartening is to buy a camera only to find out it overheats and shuts down when using the main feature you bought it for. I guess it's going back to the old RED day's when you have to chill the camera in an icebox or cooler. lol
 
improser said:
Why not modding the a7RII with a backplate or something to disipe heat?
Click to expand...

I read an interesting speculative article on the overheating issue (can't seem to find it right now) where they suggested that the 5 axis stabilised sensor had to be free to move at high speed in any direction to accomplish the stabilisation, which would suggest that a heavy heatsink or other bulky thermal cooling solution would be difficult to implement. Without doing any research myself, I can see why that might be the case. Depending on whether it's the sensor or the signal processing circuitry which is generating the most heat, an external cooling mod may or may not improve matters.
 
ericyoung said:
I read an interesting speculative article on the overheating issue (can't seem to find it right now) where they suggested that the 5 axis stabilised sensor had to be free to move at high speed in any direction to accomplish the stabilisation, which would suggest that a heavy heatsink or other bulky thermal cooling solution would be difficult to implement. Without doing any research myself, I can see why that might be the case. Depending on whether it's the sensor or the signal processing circuitry which is generating the most heat, an external cooling mod may or may not improve matters.
Click to expand...

There are several resources that claim the sensor has a heat sink coupled to the back of the floating sensor. How heavy duty this heat sink is would be anybody's guess. But obviously not good enough for internal 4K recording.

One reviewer said "The 5-Axis Sensor-Shift Stabilization mechanism also moves a magnesium-alloy heat sink that’s attached behind the sensor."
http://briansmith.com/sony-a7ii-hands-on-review/

The above statement is with regards to the A7II's sensor, but I would assume the same is true of the A7RII.

You may be able to spot it in Lensrentals' A7II tear down:
http://www.lensrentals.com/blog/2015/02/the-a7ii-teardown-a-look-inside-sonys-new-camera

In the book "Sony A7II Beginner's Guide" by Alexander Mayworth, he writes something similar:
https://books.google.ca/books?id=Kx...e&q=Sony A7 magnesium-alloy heat sink&f=false
 
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