Changing magazine mid shoot? - 16mm

[Owen A. Davies]

I'm used to shooting with 400ft magazines on smaller student productions and never having to change the magazine mid-shoot. However, I may be using the Krasnagorsk-3 soon, which only accepts 100ft reels. Is there a safe and reliable way to swap out the film reels reels, store them, and replace them with new rolls mid-shoot? 

[Don Cunningham]

I have only used 100ft rolls and can offer this based on my experience. Unless your talent remains perfectly still and your camera/tripod are bolted down, I imagine it is difficult. Since the K3 is wound, you'll need to know how long it can go before needing to be wound again. Write that number of seconds down. Rehearse and time your scene so you know how long a take can go.