I think I have the lens and body figured out. What I'm not familiar with is the cycle of operation. When I trip the shutter am I supposed to keep the release depressed until the shutter closes? I'm familiar with Pentax67 operation. I release the shutter. Mirror moves up, baffles open, film is exposed, baffles close. Lens and body need to be recocked which opens up the lens(the diaphragm blades were stopped down) and film advances. This sound correct? I was not expecting to see the lens aperture blades closed after releasing the shutter and I thought something was wrong. Thanks for The assist.