Not the same question, but analogous. I was sitting on the ground in my front yard, taking a close-up of a dog tooth violet with my Pentax 645n. My 120 macro was mounted, of course, as was the right angle finder and a cable release. The camera was on a focus rail and supported by a Manfrotto tripod. My next door neighbor Sylvia, who is a nosy busybody, hollered "Mighty fancy camera, George. Is that a Nikon?"

Naturally I couldn't let that go unchallenged, so I told her no, it was a Pentax medium format film camera, the likes of which Nikon had never made. I don't think she had any idea what I was talking about....