office, banquet) Hole 4 is clearly a bit dark (when compared even with the same 50 f/1.8), but at the same time it is functional and sharp up to 70 so the dust a little (but not much) then it is better to prefer 24-70 f / 2.8 to him, you will remember 24-105 average optics, but a budget Elka :) Do not use it for shooting portraits, because the bokeh is not ice, and it is soapy at a long focus (from 70 mm) take fifty kopecks for 3 thousand in addition to it and make portraits on it.
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