Mihun, $700 must be the American price... the reports I've seen are either American or British. However, the loonie is rising and the greenback is falling so maybe we'll still get a break.
Magnus, yes, the RX0 lens is f/4 while GoPro's IIRC is the the larger f/2.8 which will gather more light. But OTOH, the RX0's sensor is larger which will should also gather more light and from the preliminary reports out there, should make the RX0 about one f-stop faster than a GoPro. So I guess in theory there should be an improvement in low light performance with the RX0 but there will be reviews comparing GoPros vs RX0 and low-light performance will likely be included.
The larger sensor is a one inch, and how Sony managed to pack that into a camera body so small, I don't know... anyway, besides improved low-light performance, with a sensor that large in a compact camera, there should also be improvements in image resolution (a sharper image), dynamic range (greater shadow detail and highlight detail, should be improved without washing out or blacking out), and less image noise. The reviews will be out eventually and this should be covered.
The RX0's sensor should be several times larger in area than the typical waterproof point-and-shoot, resulting in better image quality. How much larger than the typical GoPro sensor, the info is probably out there, and the reviews will no doubt explain since this is being promoted as a GoPro beating design in the camera reports.
Sony replied to my email saying they don't know whether the external mic attachment and port connection without the waterproof housing will be waterproof since the RX0 hasn't been released yet. And maybe because it's a long weekend.
For better sound quality (which why this whole thing started), it seems there is an option now to connect an external mic to some GoPros without DIY hacks, but it still needs a waterproof housing and the connection is on a back door on that, rather than the port on the GoPro body. Submersible to one meter, so should be fine for canoeing.
...this one is waterproof. That’s unusual for external microphones on GoPros. Normally when you add an external mic to a GoPro it exposes the USB port. The way they’ve gotten around the connection issue with this one is that the microphone is hardwired into a new backdoor for the camera’s housing. It has a waterproof rating of IPX7, a rating that specifies it can safely be submerged at a depth of up to 1 meter for up to 30 minutes.
https://havecamerawilltravel.com/gop...ke-2-elements/