Although I can't comment for the reliability of magazine reviews,
Amateur Photographer rated the Sigma 12-24 extremely highly. I don't
have the magazine accessible right now, but from memory, the vignetting
was about half a stop (wide open and on a full 35mm frame) and the
sharpness was very impressive for a zoom (>~30lppm at 50% contrast at
all apertures and focal lengths; up to ~50lppm at best). There's a rear
holder for gelatin filters, but as you say, no good way of attaching a
filter to the fromt. I'll dig out the actual figures they measured if
you (or anyone) are interested.
S
Herb Chong wrote:
i am worried about two things in the Sigma 12-24. many Nikon 12-24 users
have almost a full stop of falloff between the center and the corners when
shooting wide open and it doesn't go away until they stop down to f11.
next, i am worried that it will be a soft lens even at its sharpest.
another issue which isn't so important is that i haven't seen any way to put
a filter on front without more than acceptable vignetting.
