The SHUTTER IS NOT IN THE LENS. I\The shutter is in the camera body in front of the ccd or cmos sensor. You are talking aboput the aperture blades. Try changing the aperture, of course, unless you have a depth of field preview, you will not see the diaphragm open.close.
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The SHUTTER IS NOT IN THE LENS. I\The shutter is in the camera body in front of the ccd or cmos sensor. You are talking aboput the aperture blades. Try changing the aperture, of course, unless you have a depth of field preview, you will not see the diaphragm open.close.