At least one of the fast mirror lenses (probably Sigma) had a lens cap with
a hole in it that could be used to reduce the aperture. I still haven't got
around to trying something similar
-jeff
----- Original Message -----
From: "Moose" <olymoose@xxxxxxxxxxxx>
>
> All mirror lenses so far are fixed aperture. Figure out how to make a
> variable aperure mirror lens that works correctly and can be
> manufactured at a reasonable cost and your fortune is made.
>
> Moose
>
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