The Viewsonic 3DV5 has a maximum optical sensor size of 1/2.5". That's 15% more optical sensor size than the most common optical sensor size of 1/2.88". 5.76 x 4.29mm. Across all camcorders that were launched more than two years ago the worst optical sensor size is 2/3" and the best is 1/1.3".
We compared this video camera to all the other video cameras that have a 1/2.5" optical sensor size and we think because of it's better review score, the Veho Muvi HD NPNG is also worth considering.
If you want a video camera with a bigger optical sensor size then you might want to look at the Samsung SMX-C10 (1/1.6 and higher rated).