Lens arrived this morning, and I was able to take a few quick shots at lunchtime to get some very quick first impressions.
Also, the quality of the fit and finish on the Tokina is indeed impressive for a third-party consumer-grade lens offering. It looks, and feels, like it is built to last. Even the lens hood seems to be made from a thicker, tougher plastic than many of the Nikon hoods I own. Very nice.
The lens handles nicely on the A200 - it's about the right size and weight, and the rubber grip around the zoom is, well, nice and grippy :-) It doesn't make too much noise when focusing (no more than my Minolta 35-70mm f4) and latched on to focus quickly (outside in bright daylight). So far, so good.
That would mean I'm getting an equivalent field of view of a 30mm lens in traditional film terms - not 'ultra' wide, but wide enough. And because the Tokina is a full-frame compatible lens, once I upgrade to a full-frame Sony camera, then the 19/20mm will really be a 19/20mm!
But talk of 'ultra-wide' aside, the first few images I've taken with this lens on the A200 have been very positive. Really nice colors, good contrast, lots of detail, and great front-to-back sharpness from the f8 aperture. Initial impressions are that the Tokina 19-35mm well deserves its legendary status as the 'plastic fantastic'.