This is an (around) ten seconds shot purely hand-held (without support), but the camera I used means almost cheating : a Minox 35EL.
the Minotar lens is relatively short focal (35mm)
the shutter release is very quiet
the viewing is permanent (rangefinder style)
the shutter is electronic : you only have to open it, stay still and wait until it automatically closes.
This image shows an interesting Xmas decoration in a french gothic church: suspended Xmas trees !