| http://www.w3.org/ns/prov#value | - you then well done , But as I say the mechanism in cheaper lens does not support accurate lens alignment so your 'perfect' lens will not stay that way.Alignment issue of cheap zooms is a function of their price point and so are not out of spec and are generally pretty sharp, Their decntered plane will have no affect on real images and are what get you a lens so cheap.Prices will rise considerably
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