Maybe. But are all zooms varifocal lenses that have their focus adjusted automatically by another "cam" inside the lens? In other words, was a zoom made as a varifocal lens because it was easier to build it this way. Imagine the 35-85 with another internal metal barrel to change focus automatically.Isnt the viv 35-85 a varifocal ( not a true zoom)lens? If so that combined with the narrower range could account for it's better performance. JCO
Andre
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