relatively good build quality it has 18mm focal length lock, but it is not necessary the zoom ring is tough on short and long focal lengths; middle positions are quite smooth and good for video you can see jerky zoom on shorter and longer focal lengths the lens has an optical stabilizer even the manual focus override is present slight changes of focus are very quick, but changing the focus from infinity to 0.5 meter takes more than one second backlight condittions do not make much troubles. nevertheless, the lens flares emerge sometimes jerky start of zooming
focus breathing is present on long focal lengths the lens is not very sharp (big zooom brings many optical tradeoffs) sometimes, lens flares emerge optical stabilizer is good average shooting night video using this lens and nikon d7200 is not the best idea, the aperture f3,5-6,3 is not enough 1/100 s, f8, iso 100, 105mm (157mm eq), -0.3 ev 1/160 s, f6.3, iso 500, 32mm (48mm eq), -0.3 ev visible chromatic aberration 1/250 s, f7.1, iso 450, 300mm (450mm eq), +0.3 ev
not very good sharpness 1/640 s, f6.3, iso 100, 300mm (450mm eq) relatively good macro 1/1600 s, f3.5, iso 100, 18mm (27mm eq), -0.3 ev
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