Camera Lens Bolex

Camera Lens Bolex
What ue can be made of old, more or less obsolete, Camera Lens?

I have some (3) out-of-sight lens (Switar f 0.9 for instance) for a Bolex 8mm movie camera, that must be good for something.
What use………..

To use the lens get a Bolex 8mm movie camera, heres a link they are selling for $10-90……..

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Waterfront Camera Workshop: Bolex Vario-Switar 16-100mm Lens