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The following opinions have been automatically translated with Microsoft Translator. | Tamron 24-70mm f/2.8 Di VC USD Pros: Sharpness quite good already wide open, good yield of fuzzy (but see Cons) AF fast and silent, effective stabilizer and quiet, excellent construction, competitive price Cons: Bokeh onion in some situations Opinion: BACKGROUND: I bought the lens for a next step to Full Frame, at the moment I have a APS-C body, so all the tests and the results of which I speak are evaluated on cropped sensor body. rnrn-Sharpness and IQ: The sharpness is GOOD at the center of the frame at all focal lengths, even at full aperture. What really leaves satisfied is that moving towards the edges, until arriving at the corners loses very little and has a sharpness EXCELLENT when compared for example to 50 mm 1.8 (that the center is, however, slightly sharper). This suggests that the lens is much more enjoyable on full frame, where I assume a GOOD sharpness from corner to corner. rnLo focus is very pleasant. Very creamy and without the "jitters". The shape of the bokeh light points is perfectly smooth, round, elliptical without variations. However, in certain circumstances (actually not too frequent in normal situations), such as underexposed background with bokeh, bokeh presents onion. rnQuesto is aico defect with regard to the optical quality, aberrations not detected absolutely and sealing of the flare medium-high. rnrn-AF: autofocus is on the whole, VERY GOOD. Precise. Quite fast (a little slower than the 85mm 1.8) and inaudible. rnrn-VC: the stabilizer is GOOD, 70mm can shoot at 1/8 without shake; 24mm to arrive in fifth. Silent too, feels just approaching the ear lens. rnrn-Building and nuts: The build quality is EXCELLENT. Is not a featherweight but it is still slightly lighter than lenses with which contributes. From an extreme sense of solidity. Very convenient lock button zoom to 24mm to avoid accidental extension. The zoom ring is the one towards the front lens, the focus is toward the body. The collars also run counter to the objectives canon, I is not appearing at all difficult to adapt. The zoom ring is large, well rubbed, hereis hard, as I find it convenient. rnQuella focus is smaller and softer, is convenient and very precise. rnrn-Vignetting and distortion: scattanto on aps-c clearly this does not say anything. Additionally, there are features that I consider important. rnrn-comparisons and conclusions: The only competitor that I tried was the Canon 24-70 2.8. Mark I. I am not convinced at all neither for its sharpness, nor for the AF. Honestly with tammy I had suffered very much feeling. As I have already pointed out, the sharpness is good already at room temperature, with good sealing the edges. The stabilizer can be a godsend as to do nothing, that is very sogettivo, I have also tried the video and I must say that you turn by hand as if he were on a tripod. Recover in the photo is 3.5 stop the endpoint canvases and 3 stop on the extreme wide-angle (and I do not have very steady hand). The only problem, as mentioned, is in some rare cases, the bokeh onion. What can I say? the straconsiglio. Non doubt that the mark II canon is sharper, but has no stabilizer and above all cost at least twice as much! sent on December 28, 2012 |
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