"John Whittingham" <[EMAIL PROTECTED]> wrote: >> i've been eyeing the 500/4.5 and the 800/5.6 for a while. the 500 is >> available in Pentax mount, at least. the 300-800/5.6 isn't. i hope >> that the 800/5.6 is. for small bird work, 800 on the *istD is just right. > >I think the 800/5.6 would be awesome, personally I'm trying to fill the gap >in my present outfit needing a fast 200mm AF lens. I'm wondering if they'll >work with film and digital.
They will. Sigma's "DG" lenses are full-frame but "optimized for digital" (I'm as suspicious of this digital optimization as herb Keppler is.) Their digital-only (small image circle) lenses are designated "DC". -- Mark Roberts Photography and writing www.robertstech.com
