However, if you look closely at the buildings and trees at the edges of this picture you can see fairly obvious color fringing and blurring. 0.66x Nikon 0.66x. I've reviewed and, like the Nikon teleconverter, it is an excellent lens. The images are very good, although not quite as good as those produced by the teleconverter. However, it is very slight, and only occurs in images where there are areas of marked contrast near the edges.
Most images look beautiful.
The lens is physically as small as any of the teleconverters on this page, and is made of durable metal. Sample Images Click on the small images below to see the unmodified originals taken with a Nikon 900.