this was an experiment. my camera does not have a multiple exposure feature, so i thought to myself:
"how can i make multiple exposures in-camera?"

i put an 8x neutral density filter and two polarizing filters, turned in relation to each other for minimum light transmission, on the lens, which was set to its minimum aperture (f/22). the light meter in the camera suggested a shutter speed of about 5 seconds, so i chose to make five "exposures" of one second each.

i used the bulb setting, pressed the shutter with the lens cap still on, took the lens cap off for about a second (just counting one mississippi), and then back on. while holding the shutter release pressed down, i moved closer to the subject, put the tripod down and leveled the camera, before I took the lens cap off for another second. this i repeated until i had my five exposures, at which point i could finally let go of the shutter release. of course, i could only use the viewfinder on the first exposure and would just have to guesstimate on the four subsequent ones.

i shot raw, which gave me control over the overall exposure and tonalities in adobe camera raw. for example, the black point was set quite high (50) to get the full range of tonalities you see here.