A Worthy King of the Wide

This lens has rewritten many a rule about wide-angle photography. In my opinion the shear complication of its construction makes it prone to sample-to-sample variation more than many other lenses. I had this problem - even though I sent my lens to Nikon for adjustment of focus and CA's, it didn't come back perfect. My D200 easily picks fault with it at 100% magnification. OTOH, in this focal range, this lens is a world apart from the competition (at least counting lenses compatible with Nikon bodies). There simply are too many laws of nature in the way of this lens. Taken for what it is - a truly professional lens with its inherent strengths and weaknesses - it faithfully produces wonderful pictures with a minimum of distortion. It's bright, lightning-fast in its AF and has the solid build of the Great Wall of China.