Anybody has this lens? How good/bad is it? I'm tempted by the 24 mm, but I'm not sure about the quality. How is the manual focus? I'm thinking about buying either this Sigma or a FA 28/2.8 AL. Is the Pentax lens significantly better?I had these Sigma 24mm and 28mm few years back, both manual focus. Optically, both are great imho. However, both suffers from flare problem and substandard mechanical design, particularly the aperture ring assembly. The 24mm even had worse rubber, aperture ring material and electrical contacts (all 3 wore noticably faster than the even older 28/2.8). The satin finish was a joke and the 10 years old shiny surface is better. Both hoods were useless to guard again flare, although they were well made. I don't know much about the FA28/2.8AL. But if you can afford the extra, either go for the FA*24/2 (which I am very happy with) or A24/2.8.
regards,
Alan Chan
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