G George

Hindsight has shown that I posted my problem here too soon; I have not been able to timely respond to your consequent posts.Nikon Service & Support responded to my e-mail, though they did not...

Nikon Technical Support via email was of zero help - disgusting.I have purchased a Nikon BR-2A Macro Adapter Ring, and have been having difficulty installing it onto a D80.The difficulty is that,...

For those interested in the meaning and origin of this sensor-size designation, see:
http://www.dpreview.com/learn/?/key=sensor%20sizes, or,
http://www.dpreview.com/news/2002/10/7/sensorsizes