Douglas Green , Nov 18, 2002; 07:05 p.m.
I'd say that the Tokina is pretty good for a 3rd party lens. It's not quite as sharp as my Zuiko 28mm f2.8, or my 25mm f4 Voigtlander Skopar, but it's in the same class as the Nikon, Canon, and Minolta OEM 28mm lenses that I've used (not counting exotic aspherical lenses). The only other 3rd Party 28mm lenses that I've had that are comparable in quality are an Old, bulky Vivitar 28mm f2.5, and a Kiron 28mm f2, and similar Vivitar Series 1 f1.9. (All of these lenses were actually made by Kiron, who made most Vivitar lenses of that era). If you can find it in the right (i.e. modern enough) mount, the Vivitar 28mm f2.5 shows up on ebay alot and usually sells for $25-40 and it's a screaming bargain at that price).
BTW, 28mm is my favorite focal length by far, so I have experience with tons of 28mm lenses. The best I've owned is the Olympus Zuiko 28mm f2.8 and the best I've ever seen are the Leica 28mm Elmarit-M and Minolta 28mm Rokkor-M, both made for Leica Rangefinder mounts, with shorter back focus (the 25mm Voitlander Skopar is similar in that regard)