i am a little confused, can you guys help me out?i am new to DSLR and i put my new Nikkor 50mm F/1.8 lens on. if i don't turn the lock ring to F/22 on the lens, i get an "f EE" error. the manual says if i get this error then i have to set the lens at the highest arperture setting. this confuses me because on the lens i can unlock the ring and select an F-stop all the way down to 1.8...but if i do, the camera just does not work. what am i doing wrong?