Some say the days of the cheap video camera are numbered thanks to the proliferation of smartphones with better imaging components. Vivitar still manages to fill a niche for people who aren't interested in putting their phones underwater. For a mere 60 bucks the DVR-690HD provides 720p HD (25 fps) video recording in up to 10 feet of water.
Stills are captured at 5 megapixels, and video clocks data usage of one GB for every six minutes using the AVI M-JPEG file format. An SD expansion slot accepts cards up to 32 GB. Don't count on any on-board memory; the 690HD only has an 8 MB buffer built in.