The most rugged Nikon is the second one you have when the first one will have failed.
Fun fact: I used to shoot a Spotmatic F, but I dropped my 28mm from a relatively low height on an average floor, and the weight made it so that the focus ring just got bent. I switched to Nikon in part because their lens construction seemed to be smarter (that and the wide basin of available gear, etc.)
I absolutely adore my Nikon F from an aesthetic point of view; I'm sure it's not too shabby either in terms of impact resistance, but I wouldn't bet on it just because it's heavy.
Fun fact: I used to shoot a Spotmatic F, but I dropped my 28mm from a relatively low height on an average floor, and the weight made it so that the focus ring just got bent. I switched to Nikon in part because their lens construction seemed to be smarter (that and the wide basin of available gear, etc.)
I absolutely adore my Nikon F from an aesthetic point of view; I'm sure it's not too shabby either in terms of impact resistance, but I wouldn't bet on it just because it's heavy.