----- Original Message -----
From: "Carlos J. Santisteban" <zuiko21@xxxxxxxxx>
>
> From: "C.H.Ling" <ch_photo@xxxxxxxxxxxxx>
>>Based on the results I obtained with the OM wides on 5D II, I don't think
>>the angle of incidence really made a big trouble to the edge image
>>quality,
>
> However, in SLRs the angle of incidence would be much less of a problem,
> since the larger register rarely makes it go over 30 degrees or so.
>
It was an old topic, Olympus claimed it is a problem for other
manufacturer's lenses, their 4/3 lenses will improve that.
>>The incidence angle of DZ doesn't seems much better than the old OM
>>lenses,
>>it can be seen from the small diameter of the rear lens element of the DZ
>>lenses.
>
> Again, they have to cover a smaller circle, so a bit less diameter is
> actually needed.
>
Olympus claimed they improve the corner performance by reducing the angle of
incidence to the sensor (or even try to make it parallel), a parallel beam
require rear element as larger as the sensor diameter but we didn't see
that.
C.H.Ling
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