----- Original Message ----- From: "Doug Franklin" Subject: Re: Sigma 300/2.8 DG for Pentax
> > By the logic you're using above, it seems to me there'd be no reason for > them to have replaced the FA series withe DA series. I can't imagine > how a 50-200/4.5-5.6 for full frame could be as small and light as the > DA version. That could simply be a failing of imagination on my part, > though. ;-) I think your argument loses itself with longer focal length lenses. A 600mm lens is going to have a big image circle no matter what. It's just the nature of the beast. Logic dictates that small image circle lenses should be much smaller than 35mm coverage lenses, but this isn't really panning out in many cases. The 12-24mm zoom is huge, the 14/2.8 is very close to the same size as the 15/3.5 (admitedly it is also a half stop faster). The new Limited lenses are quite small, but they get their compactness by trading off maximum aperture. William Robb -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
