I believe the elusive 35-80 also shows this behavior... (it actually
is a 35-80 f2-2,8 lens, and the movement is very minimal)
Iwert
2010/5/5 Dawid Loubser <dawidl@xxxxxxxxxxx>:
> Hello fellow Zuikoholics,
>
> Could anybody that owns / uses a 250/2.0 please check something for me
> on your lens?
>
> I noticed something odd today - when the lens is set wide open, and
> you look into it
> while pressing the DOF preview or tripping the shutter, the aperture
> blades stops down
> a little bit (unlike any other OM Zuiko that have used).
>
> I know object scales when looking into a huge piece of glass like this
> is deceiving, but
> it "appears" as if the aperture closes down by a radius of 5mm
> (perhaps less) - a small fraction
> when compared to stopping down to f/2.8, but still visible.
>
> I was just curious whether it's a quirk of my lens, or whether this is
> normal. The only other
> lens I've seen with similar behaviour, at certain focus distances, is
> the electronic
> Canon EF 100mm f/2.8 Macro, but I know there are others (like the CV
> 125mm Macro).
>
> regards,
> Dawid
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