A850 note: We don't know if the A850's mirror is the same size as that of the A900, or slightly smaller. Our contacts at Sony said it's the same mechanism, but tweaks in some unspecified aspects of the mirror/shutter cocking mechanism allowed the trade-off of slower continuous shooting speed to achieve lower production costs and therefore lower selling price.)
Quelle:
http://www.imaging-resource.com/PRODS/AA850/AA850A.HTM
LG