Buy New DSLR Camera Digital SLR Camera reviews and DSLR Buying Guide

My old Nikon F-4 SLR allowed me to aim at a neutral grey area (like grass) for exposure, press the exposure preset button, then hold that button down while moving to the selected subject for automatic focus while snapping picture, maintaining the neutral grey exposure. Is there a DSLR camera that has that feature? Nikon tells me they don’t have a DSLR with that feature. Thanks!