John,

Here's some information I just found, on the Web, about DSLR shutter
lifetimes:

Nikon D200 - 100,000 actuations
Nikon D80 - 50,000 actuations

The above data, alone, seems to indicate that the D200 is considerably
more robust than the D80.

Thanks for this info, it's interesting. So it looks like I should be more
careful, accurate, and don't shoot too many times. Say, if one short trip
takes approximately from 500 to 1000 shots then I can destroy the shutter in
50-100 trips. Not so good. I expected more at least in times.

Just D.