There have been a few comments recently about the "doughnut" effect
you get from out-of-focus point highlights in a mirror lens. I think
it is quite a pleasant effect, and it can be used creatively - I've
seen a lovely shot of kids playing in backlit surf which is rendered
almost abstract by the mirror lens' characteristics.
However, it can turn round and bite. I used to use one for
photographing cricket*. Often the backgrounds were leafy - trees or
hedges. Get an out-of-focus hedge with a little bit of colour
variation in the leaves and the result is EMETIC! Haven't we got
"Bokeh" as a topic for an upcoming TOPE? If we have I'll see if I can
recreate one of these horrors for it.
(OM content - the Zuiko 500/8 was neither better nor worse than the
Tokina 600/8 in this respect.)
John
* "Cricket" (n) An impenetrable ball game played in England over a
protracted period of time, the objective of which is to end in a draw.
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