Here's a URL for a relevant ad:
http://www.awaiba.com/en/products/medical-image-sensors/
This is for a digital video camera the size of the ball on the end of a ball-point pen. They have a stereo 3-D camera too if you have enough space for it...2.8 cubic millimetres.
Edited to add:
Oh, and that includes the lens.
Here's a URL for a relevant ad:
http://www.awaiba.com/en/products/medical-image-sensors/
This is for a digital video camera the size of the ball on the end of a ball-point pen. They have a stereo 3-D camera too if you have enough space for it...2.8 cubic millimetres.
Edited to add:
Oh, and that includes the lens.