優點:
very usable F/2.8
rigid body and built
nice craftmanship
very good lens zooming design (the length of hood is max utilized at all focal lengths)
produce clear, shiny colours
low distortion at 24mm and up
fast AF speed
Smooth + precise focusing ring
'PROFESSIONAL LOOK'
缺點:
- too long to be put in the camera bag with hood on (8 inches long)
- the Zooming ring was stiff when new, and even stiffer when aged!
- not a perfect match with my D90 due to focusing issues
- soft at wide end, and some visible distortion
評價:
我覺得唔好:
要sharp鏡的朋友請買prime, 這鏡不是最佳選擇.
以wide end 影景或architecture 也不應選這鏡, 因distortion 令遠近距離感失真.
向著太陽會見到好大粒七彩stray light, although most lenses do, but...really 好大粒
用久了zoom ring 好緊, 到35mm會微微'卡一卡'
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一半半:
這鏡影出泥D色好艷, 有人中意, 我覺得比較exaggerated,有失真, not my cup of tea.
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我覺得好:
富立體感!
contrast 一流, 有能力表達細少光暗變化
可影出夢一般bokeh
2.8同5.6 picture quality 差別唔大, so there really no need to stop down in most occasions.
在低光下色彩也能保留! this is impressive! also it is one of the charateristics of a fast lens.
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about the D90 match with this lens: there is a slight field curvature, which is while the centre is sharp but the boarder is out of focus, I have to turn the focus ring slightly to adjust for optimum result. havn't seen this problem with other models of cameras, or is this becos of variation between production?
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強烈推薦這lens if you are doing event photography
not recommended for traveling(heavy and big), hiking etc.