DSLRUsers.com

I'm not sure how much credibility one should assign to someone who likes to be known as "Digital Darrell" but it makes an interesting read, especially for the Canonites contemplating a 5D.

http://www.digitaldarrell.com/DDBlog-ShouldNikonMakeA35mmSizedSensor.asp

It is interesting to read that the sensors have a significant fall off as light comes from progressively greater angles - the same principle also applies in the human eye (the Stiles-Crawford effect). This is overcome in the eye by having a curved retina, so that light coming peripherally still strikes the retina perpendicularly.

Maybe someday digital sensors won't require microlenses, and will accept angled light more like film.

I wonder if the solution is to change lenses to straighten the light, or to design the sensors to be curved?