I agree that the number of diaphragm blades has a lot to do with
smooth bokeh. While bokeh is not real high on my list of
desirable lens attributes, I have observed quite good results from
a couple of other lenses of the nine-blade sort: 90/2.8 Tamron
macro and 80-200/2.8 Tamron. And my most-used macro lens, the
135/4.5 Zuiko, has eight blades and delivers bokeh that's
definitely a cut above. The bokeh champion of all my lenses,
though, is the 300/2.8 Tamron at 2.8 or 4.
Walt
---------- Original Message ----------------------------------
From: Giles <cnocbui@xxxxxxxxxxxxx>
Reply-To: olympus@xxxxxxxxxxxxxxx
Date: Thu, 10 Apr 2003 14:22:36 +0100
>I personally believe bokeh has more to do with the number of
>aperture blades than whether a lens is optimized for close focus
>or not.
>
>All the Zuikos with nine aperture blades have reputations for
>exceptional bokeh (90/2, 100/2, 180/2, 250/2, 350/2.8)
>
>The Zuiko 80/4 macro has six aperture blades and does not have as
>nice a bokeh, IMO, as the 90/2
>
>Giles
>
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