Red light blinking on 70D - why?

[Cahoon38]

Hi all:

I've got a 70D. While shooting video, the red light on the back on the right blinks.

I've tested the battery and it's fine according to the "battery info" in the Menu.

I've also re-formatted the card which is a Sandisk Exteme Pro 64 Gig.

I've gone through the PDF manual and found nothing about the blinking light.

The camera works and the videos are just fine, but why does this light blink?

Is this just an idication that the camera is busy or does it indicate someting else.

Thanks for replies

[shadowsports]

Are you talking about the Card Reader LED?  If so, the LED will flicker when the card is being accessed  (Read/Write).  This is normal.

70D's are susceptible to orverheating during prolonged video use.  There is a LED warning indicator in the viewfinder for this.

[Cahoon38]

Thanks for the reply.

The light blinks as soon as the record button is pressed and it keeps going.

[kvbarkley]

As stated, of course it does. It indicates that the camera is writing to the card. The camera does not have enough internal memory to save a whole video so it has to save video at the same time it is recording it. That is why you need a fast card for video.

[Cahoon38]

Well, as mentioned, the card is a Sandisk Extreme Pro with 64 GB of storage.

So, isn't that fast enough. And if it isn't, what do you recommend?

[kvbarkley · Accepted solution]

No, it is plenty fast.

Blinking during video is NORMAL.

[Cahoon38]

Thank you, thank you - that's all I wanted to know.