I used a lens cap yesterday on a lens without shutter. The lens is a Repromaster 213mm from a plate burner that Peter got for me from the Amish print shop salvage business where several of us have gotten beautiful equipment. The bracketed exposures were 45 seconds and six minutes. We had hoped the lens would have coverage for 7x17. It did not. I am trying it now with my 8x10. The first negative developed last night looked good.
Several years ago Peter and I were shooting in the main stairwell of the Cuyahoga County court house. I was half way through a 15 minute exposure when a lady walked up the stairs. She looked at my 8x10 with me staring at her while standing beside it. She asked if I were taking pictures. I said yes. She smiled and read the plaque on the landing in the middle of my picture. She called her daughter from off camera to come look at the plaque. The daughter came up the stairs and read the plaque. Then they turned and went back down the stairs, all the time with me standing beside the camera. Having anticipated such a problem I had put the dark slide over the open lens when I heard the first the woman coming and stopped my timer. When they left I removed the dark slide and started the timer again. The picture worked out pretty well.