Hello All,
I am curious on this issue, also. I have just finished counting the blades in a
Leitz Elmar 90/4. There are so many, I may have lost count, but I think it has
15 blades. As you close the iris down, the aperture remains a virtual circle.
This effect is not duplicated by any 6 or 8 blade diaphragm. Does it have an
effect on flare, ghosting, etc. or only in the *shape* of such artifacts?
John
sje@xxxxxxxxxxxxxxxxxx wrote:
> John A Prosper asked this (and has been answered, so I won't repeat it here).
>
> Which brings me to another question:
> As this lens is so good why do people suggest that 8 or 9 blades are
> preferred? The Zuiko 100 f/2.8 also has only 6 blades but also has good
> performance (including bokeh). Is the "more blades=better" a myth? There is
> likely to be some improvement but I suspect it is not as important as some
> people maintain. Those of you with 9-blade lenses please don't feel too bad
> about it ;-)
>
> Simon E.
>
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