Hi guys, wonder if anyone out there owns a Zenitar 16mm Fisheye and uses it on a EOS. I'm currently using it on my EOS and found out that the meter reading doesnt change when i turn the aperture ring. I am using an EOS 66 and at Av mode. Does anyone know the problem or is there any problem at all?? i think it is that the pin that actually activates the aperture ring is not depressed by my camera due the body's design.