I shot a roll with my FE and Non AI 135mm last weekend,. The images I shot with that lens were under exposed. I went back to instruction manual and it discribed the use of Non AI lens to depress and hold down DOF button while tripping the shutter at the same time. Is this correct? The technique I used was to depress DOF lever with my middle finger and push shutter with pointer finger. It's a little awkward.
I shot a roll with my FE and Non AI 135mm last weekend,. The images I shot with that lens were under exposed. I went back to instruction manual and it discribed the use of Non AI lens to depress and hold down DOF button while tripping the shutter at the same time. Is this correct? The technique I used was to depress DOF lever with my middle finger and push shutter with pointer finger. It's a little awkward.
Yes. It's so the meter will set the correct exposure, since there is no aperture coupling it would otherwise "think" the lens is wide open and expose accordingly. Try cradling the body with your left hand and using the left middle finger for the stopdown button. Be sure to press the stopdown button first, then the shutter.
In aperture-priority automatic mode you have to hold the DOF lever in before pressing the shutter release.
In manual mode you must hold the DOF lever in to meter. Once youve set the shutter speed and aperture there is no reason to hold the DOF lever. The lenss diaphragm will close to the preset value as the mirror snaps up and before the shutter cycles.