After playing with the FA 300 f4.5 two nights ago, doing a
lot of gratuitous close-up autofocusing, I went into the
menu to reformat the card. As soon as I called up the menu
the camera froze. It would not do anything. I could not even
turn it off. Finally I thought to open the battery
compartment. I did, and reclosed it, and the camera came
back to life.
The batteries had over 1,000 shots on them, and it must be a
big drain autofocusing that heavy lens. So I assume that the
batteries were so drained that the camera could do nothing
but display the menu.
I put in fresh batteries and the D seems fine now. I believe
I recall others having similar odd problems when batteries
get low.
Joe