The easiest way would be to apply an aperture mask to the front element.
Aperture ranges would be pretty limited though if the aperture had to
be round. No reason why it can't be oval or kidney bean shaped though.
Chuck Norcutt
Moose wrote:
>
> We've had discussions about whether, and how, variable aperture with a
> mirror lens might be possible. Looks like nobody has yet figured it
> out. :-)
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