According to Lytro, the Illum Light-field camera will have a 30-250mm equivalent focal length with a constant f/2.0 aperture.
- What is the actual focal length of the camera? Or,
- What is the sensor size?
The lens is actually 9.5mm to 77.8mm according to Amazon. That should make it somewhere around a 1 inch sensor since the crop factor is around 3.
to confirm AJ Henderson's post: the Lightfield Forum says it's a 9.5 - 77.8 mm lens and 1-inch sensor http://lightfield-forum.com/lytro/lytro-illum-professional-light-field-camera/