To do hours-long exposures (such as star trails at night), I have found it is necessary to find a way to prevent the film from moving. Since the regular double-sided tape is too sticky, in the past I've made my own by gluing a piece of such tape with post-it (TM) tape. Still, the problem I had was that loading and particularly unloading film became difficult, since the film cannot slide anymore.
Is there more suitable adhesive material ? How do you handle the film ?
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