Fabio Fiorellato wrote:
> ...and what a diaphragm, indeed! :)
>
> The strange thing is that the donut shapes doesn't seem to change (while
> they were supposed to) and their resolution seems to improve by reducing the
> aperture...
>
> Anyhow I'm still of the opinion that there still is a (rather unperceptible,
> I do admit) impact on the DOF by stopping down the lens, judging by the test
> images. Maybe the 300mm focal length and the mirror design don't help at
> getting a more pronounced effect, who knows.
>
The DOF effect of such a change in aperture on a conventional design
300mm lens is MUCH more pronounced.
> At least it seems that someone has found a way to build variable aperture
> mirror lenses (and we all have seen with what results! :)
>
Not much, as I'm sure your smiley face is meant to indicate.
Moose
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