Pentax k1000 load film and shutter clicks. The first one with 1 second of exposure. The second one with 1/8s. The third and fourth - 1/125s. The last 2 clicks with 1/1000s. Recorded with h4n, 24/48.
The sound of me attaching and deattaching two of my lenses to my pentax k-x which are the 18-55mm kit lens first and then my 80-200mm sears lens next. It was i believe five times for each lens. Recorded with the audio technica atr 6550.