I visited on a grey-ish, rainy day, when I wanted to be "safe and sound" inside, rather than tackling the elements! I purchased the combined elevator/museum ticket. The transparent elevator takes you on a breath-taking ride up through the centre of the Museum to the top of the Mole Antonelliana. There is an observation deck, where you can get uninterrupted views across Turin.
I happily spent a couple of hours exploring the museum. It takes you from the earliest steps in projection theatre (e.g. shadow puppets), right the way through to modern day techniques (in fact, there is a sequence of 1.5min films that take you through the production process). There is also some basic scientific explanation of how lenses work (although the written explanations are only in Italian). There are "mini-cinemas" with a range of subjects, and you can view movie scripts (including Psycho!), costumes or replica costumes and props, and a huge collection of movie posters.
Definitely worth a visit!
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