Unfortunately, the Leica's take-up spool needs along tapering tongue of film, which users must wedge under a spring clip on the spool's barrel before manually wrapping a few turns of film around it.
On clear days you will probably want to head straight out onto the observatory's wraparound terrace, which looks out over a rippling sea of pearly-white summits, deep into Italy, Germany and France and over the 22km-long tongue of the Aletsch Glacier, the longest of its kind in the Alps and a Unesco World Heritage site.