Hi Ted I would say 1/25 sec as the speeds on the older Autocords were the old scale of 1, 2 , 5 , 10 , 25 , 50 etc so I am picking 1/25 as 1/10 would have more than likely showed up some movement . Steff did not know I had taken the photo as she was too busy listening to something on her phone. A few moments before I took a meter reading from the desk behind her. The Autocord has a very quite timer and shutter so is good for the odd sneaky photo.