The Nikon D300s
 

Hi
I'm thinking of getting the Nikon D300s, question can I use autofocus in video mode with the D300s
Hugh

The answer is yes, but, although movie mode still feels a little tacked-on, it is significantly improved over existing Nikon DSLRs. The biggest difference it that the camera can now use its contrast-detection autofocus system while shooting movies (by setting Liveview mode to 'Tripod'). We'd recommend using an external microphone if you're likely to use this features, since the noise of the camera or lens autofocusing can be heard on the movies. It's also worth noting that, even when using lenses with Nikon's ultrasonic AF-S motors, focusing isn't particularly snappy, so will have to be worked into videos as an 'effect,' rather than an annoyance.

Extract from http://www.dpreview.com/reviews/nikond300s/page19.asp

Hi Wolfie
Thanks got the D300S today ,just setting it now:)
Hugh

Hope you enjoy using it as much as I enjoy the 7D. I'm not interested in video, but on my initial test the video quality was stunning.

Harry

Hi wolfie
on a full battery when you used video mode what sort of time did you get on the battery
Hugh