Hello ! Just received my SLRMagic 35mm 1.7 and experimenting with it... So... "shoot without lens" mode...... OK Do all the settings directly on the lens.....OK Aperture automatically displays as 0.0......OK........Hey wait! Wouldn't it be cool if we could tell the camera what the aperture of the lens is so it could calculate the speed for correct exposure in aperture priority mode? Have I missed something? Is it possible? Otherwise how do you do to get correct exposure? Trial and error?