Sony Alpha DSLR-A380 Review
Studio Tests - Sony DT 18-55mm F3.5-5.6 SAM lens
The announcement of the Alpha 230 / 330 / 380 series was accompanied by that of four new, inexpensive lenses, between them designed to cover a broad range of shooting situations, and all featuring Sony's latest 'Smooth Autofocus Motor'. These new optics are the DT 50mm F1.8 SAM 'portrait' lens, DT 30mm F2.8 macro, DT 55-200mm F4-5.6 telezoom, and the DT 18-55mm F3.5-5.6 SAM. The latter looks destined to become the standard kit lens for Sony's APS-C DSLRs from now on (replacing the ageing DT 18-70mm F3.5-5.6) so we've tested it to see how good it is.
The DT 18-55mm F3.5-5.6 SAM performs very well for a kit lens, challenging the Olympus Zuiko Digital 14-42mm F3.5-5.6 for the crown of best all-round performer in its class in our studio tests. It's undoubtably superior to the DT 18-70mm F3.5-5.6 lens it replaces, maintaining image quality across the frame to match the demands of modern high resolution sensors in a far more convincing fashion.
|Sharpness||Sharpness is high for this class of lens, and impressively consistent across the frame at all settings (a big improvement over the 18-70mm). Unusually the lens tends to be sharpest wide open and deteriorate on stopping down, perhaps hinting at a slight focus shift at smaller apertures. Overall though there's really very little to criticise here.|
|Chromatic Aberration||Chromatic aberration is generally pretty well-controlled. The only concern is some fairly strong red/cyan fringing in the corners at wideangle, but there's nothing to worry about at longer focal lengths - again an advance over the old 18-70mm.|
|Falloff||We consider falloff to become perceptible when the corner illumination falls to more than 1 stop less than the centre. There's really nothing of note here, only a stop or so wide open at 18mm.|
|Distortion||Distortion is the biggest flaw in an otherwise impressive showing - barrel distortion at wideange is strongly pronounced at 3.3%, practically matching our current record-holder (the Canon EF-S 18-200mm F3.5-5.6 IS). Zoom in, though, and distortion progressively disappears; at the telephoto end it's insignificant.|
The DT 18-55mm F3.5-5.6 SAM debuts Sony's new 'Smooth Autofocus Motor', which replaces the screw-drive coupling from the camera body with a small in-lens motor for autofocus. This works perfectly well - focus is generally fast, reasonably quiet, and accurate - and there's no obvious performance penalty compared to the screw-drive system of the old 18-70mm. The one slight irritation is that Sony users will now have to get used to two switches for changing focus modes (something Nikon shooters have had to put up with for a long time), and remember to always use the one on the lens to change to manual focus, as otherwise the focus motor and gearing can be damaged.
- 1 Introduction
- 2 Specifications
- 3 Body & Design
- 4 Body & Design
- 5 Body & Design
- 6 Operation & Controls
- 7 Operation & Controls
- 8 Operation (Live View)
- 9 Displays
- 10 Menus
- 11 Menus
- 12 Performance & IS
- 13 Photographic tests (RAW)
- 14 Photographic tests (Noise)
- 15 Photographic tests (Noise)
- 16 Photographic tests (DR)
- 17 Photographic tests (Kit Lens)
- 18 Photographic tests
- 19 Compared to
- 20 Compared to (JPEG)
- 21 Compared to (JPEG)
- 22 Compared to (JPEG)
- 23 Compared to (JPEG)
- 24 Compared to (RAW)
- 25 Compared to (RAW)
- 26 Compared to (RAW)
- 27 Compared to (RAW)
- 28 Compared to (Higher ISO)
- 29 Compared to (Resolution)
- 30 Compared to (Resolution)
- 31 Conclusion
- 32 Samples
Aug 24, 2009
May 18, 2009
Aug 20, 2012
Aug 20, 2012
|The Engineer by EXX|
from Steam Trains
|Madrid subway by MAGMATCICO62|
from Your City - Public Transport
|Incandescent Bulb by Kukla|
from Illuminate- Macro only
|Curiousity by PERCY2|
from Macro - Your Best Macro Ever
|Hoar Frosted Trees by sabishiT3T|
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