"If the battery fails in New F1 there's nothing to stop the photographer from carrying a spare, I always carry at least 2, anyway even without a battery the hybrid electro / mechanical shutter speeds of 1/125 to 1/2000 sec. plus B and the flash sync speed are still available.
P.S. Professional cameras are I.M.O. designed for professional maintenance not unskilled labour on the kitchen table http://www.mir.com.my/rb/photography...tter/index.htm"

Interesting, I just removed the battery from the F1N, and the shutter fires at only one speed.

As for "professional" maintenance, I have had more than one camera screwed up by so-called professional repair people. Canon Japan managed to chip one of the elements in a lens I sent them for service, and they told me that they were "unable" to repair one of the cameras I sent to them for a jammed shutter, they recommended that I buy a new one instead.