The 18-50/2.8, while released in 4/3 mount, I'm sure was really designed
for the 1.5-1.6X crop factors of non-Oly DSLSR's. There it translates
roughly to the 28-80 range of 35mm. Compared to the DZ 14-54 it does
suffer from lack of range on the low end but is also a constant aperture
design which can sometimes be important.
Chuck Norcutt
Ian Nichols wrote:
>
> Sigma 18-50mm F2.8 EX DC
>
> http://www.ephotozine.com/news
>
> /fullnews.cfm?NewsID=2723
>
>
> I don't quite see the point of those. <snip> And the 18-50 2.8 isn't that
> much
> cheaper than the DZ 14-54, which, IMO is worth a bit extra for the extra
> range.
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