17-55 or 24-105?

Started May 24, 2006 | Discussions thread
OP SuvoMitra Contributing Member • Posts: 844
Re: Switching lenses ..

Videodoc wrote:

I'm seriously considering the Sigma 17-70. What I really want is
an improved 17-85 or a 17-40 stretched out to a 17-70/80.

The 17-85 range is really very nice to have. I don't know much about optical design, but it seems that making a high quality 17/18 - 70/80 is just too difficult to do. Either the wide end gets woolly with lots of CA and barrel or the long end gets too soft at larger apertures. Nikon also restricted themselves to 55mm for the f/2.8 standard zoom for DX. They would have stretched to get closer to the 70-200 VR's starting point if they could keep up the quality at both ends. Perhaps this is one disadvantage of the APS-C format. Top quality standard zooms are possible only within a more restricted range than in the FF format.

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Suvo Mitra

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