Originally Posted by Mazurka
Regarding backwards compatibility, CanNik don't even come close to Pentax which offers manual metering and Av mode even with M42 lenses via a cheap adapter.
EF lenses are compatible with Canon AF bodies. That's it. Not FD mount lenses and certainly not LTM lenses.
Nikon is worse still. No metering is offered with manual focus, non-CPU lenses except with the most expensive bodies and the FM3A. Even within the AF system, not every lens is compatible with every body (and vice versa). The F mount unchanged for 50 years? My ass!
Glad you gave Pentax a pat on the back which they deserve for backwards compatibility. With Nikon it is also, My ass.