

When it has to go with focus from short distance to infinity (or vice versa) it takes quite a long time, however short adjustments, say, for birding when birds are +/- at same distance it is very responsive. As for sharpness I can't say much yet. At 200mm it seems very sharp. 400mm isn't that good but it may be because I wasn't using tripod and wasn't going with shutter speeds below 1/300 sec. Lens is heavy, after hour of constant shooting keeping +/- 2 kilos (a200+grip+2 batteries+lens) at eye level may cause some problems (like blur at 400mmaster wrote:Just a tiny question on the Tamron zoom lens: Do you like its performence of speed and sharpness so far?
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