Ryan Lee wrote on 09.08.04 3:51: > Just out of curiosity, I was wondering how it is digital lenses don't seem > to be very fast. I would have thought it'd be easier to produce speedy glass > for an APS sized sensor. Any thoughts? There are some like Nikon DX 17-55/2.8, but it costs ~1400USD, and that would be too much for average Pentax user, as today *istD is targeted for advanced amateurs at best....
> Also, unrelatedly and quite OT, anyone think it's a bit odd that Sigma > hasn't got a 50 1.4 for their own cameras? They have enough f2.8 lenses and probably thought that it is not neccessary to make these lenses. > I must be in some weird why why why mood, but I was also wondering what kind > of issues stop Sigma from offering it's 120-300 2.8 lens in a Pentax mount. > I was just wondering because considering that with a 2x converter it'd be a > 240-600 5.6, it would have been an affordable alternative to anyone who > wanted a FA * 250-600 5.6. I think that Sigma 120-300/2.8 was designed from the scratch as only ultrasonic motor driven lens, so that probably made no sense economically for Sigma to make completely new design for either Pentax or Minolta mount, mostly because this kind of lens would be bought mainly by pros using Nikon or Canon. -- Best Regards Sylwek
