N70 and Aperture priority

[Ross Goldberg]

Just want to make sure I'm doing this right...for the N70, to adjust
aperture priority, you have to set it to A, unlock the lens' aperture ring,
and rotate the aperture ring, correct?  If so, I'm wondering why they did it
that way, as I must admit it was nice being able to easily adjust it on the
body of the Pentax ZX-50 the same way one adjusts the shutter speed.

Ross