I am new to digital photography, have a Nikon D700 and 4 manual lenses from F3 days. I have keyed in the information about the lenses as requested. I assume I then have to tell the camera every time I change lenses which lens it is. How do i do this? I cannot really understand the manual with regard to this. Also is there anything else I need to know about the use of manual lenses on a D700 which would be important? Any advice would be helpful but no highly technical language please