cayenne said:
So..why DON'T they put real focusing screens on the DSLR's these days?
What is your definition of a "real focusing screen"?
A split image focusing screen works best across different aperture lenses, but messes with the metering module. A focusing screen optimal for f2.8 lenses and faster sucks for use with slower lenses, and visa versa. Indeed considering most focusing screens have an effective aperture of f2.8 it is technically virtually impossible to get accurate focus manually with them at f1.2 via the viewfinder.
So if they are going to add a "real focusing screen" they are going to have to move the metering unit and offer a range of screens optimized for different lenses and make them user changeable, suddenly not such a simple task........