Hi I'm currently using a hikvision DS-2CD2232-I5 as a weathercam which works pretty well. I'm a bit of a keen storm chaser and will go and try and get lightning shots etc with my SLR often during Darwin's wet season.
I see there are some new Hikvision models now that have a slower shutterspeed...
I just discovered it after I asked thanks! :)
I just added it to my weathercam... I have blue iris uploading a jpeg every minute to my website (still building) - http://weather.stormpilgrim.com