As I recall on the Pentaxes, the needle will peg at one extreme or the other as you move past the range where the meter is outside the the range as listed in the table in the instruction manual, as you turn the SS knob. Let's say--1/15 at 1.8 at ASA 25, or some such. Or 1/1000 at f/16 at ASA 3200, or the like. Those meters don't have the range of a hand-held, or anywhere near it. Pretty limited range, actually.