I do not recommend to buy. The usual whale glass that came with the D90 (18-105) does this lens in all respects. Surprisingly not sharp glass on holes up to 10. This is probably why it is made in ketai. Pros: Didn't notice. Compared to the whale Nikkor 18-105, it loses in almost all positions. Sharpness is worse at all aperture values. Somewhat better sharpness at the edges of the frame with 13 apertures. Handles low light conditions better. With its cons. It is not clear how to use the 1.8 -2.8 aperture range, probably intended for shooting grains of sand. The depth of field on such holes from a distance of half a meter is only a couple of millimeters. At the "portrait" distance, the whole face does not come into focus. The depth of field is small. In general, there is no practical sense to buy.
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