Aperture priority, mang. I get the impression that Nikons go "woop, not gonna do that, don't care, not listening" while Canons go "oh hey, aperture 00, I don't see a lens, that's pretty cool, whatever dude, here you go". The light sensor's in the body, not seeing a lens doesn't suddenly stop light from hitting it and that really has nothing to do with apertures... so I guess Nikon's being too clever then, eh? [robot]value null, does not compute, error, error, asploding imminent, error[/robot]