Re: DJ4000 or GoPro
 

Mine have had some heavy use over the past 10 weeks in a theatrical setting - battery life seems to agree with the above time - about 90 mins. The Chinese ones seem quite good in stage lighting. I've also discovered one extra plus point.

Stage lighting is going more and more LED, and the lighting designers love the saturated bright colour. I also do stills photography of these kinds of events and I always have trouble with blue and magenta.

One scene to the eye is clearly pink/magenta - extremely obvious but my DSLRs see a much bluer colour - so much so that the camera images are NOT what the audience see, however the DJ4000 sees exactly what my eye does, which is pretty impressive.

Underwater - I took a couple with me on holiday - again, pretty impressed. Here's a couple of vimeo links.

a short on stage clip
underwater