Sony DT 18-70mm 1:3.5-5.6 review
The Sony 18-70mm stands squarely in line with the current kit lens idiom, being a lightweight design of predominantly plastic construction. However it feels reasonably well-made, with the zoom ring in particular unusually smooth and well-damped. Unfortunately it still suffers from the most common kit lens malaise, with a narrow manual focus ring of disappointingly short travel driving a rotating front element, which in turn precludes the use of a petal-type lens hood. Overall it's of much the same ilk as the kit lenses from the 'big two' (Canon and Nikon), whereas those from Pentax and Olympus are rather more nicely designed with proper manual focus rings and superior lens hoods.
On the camera
The lens is a good match to the entry level cameras such as the Alpha 350, but feels a little lightweight on the bulkier Alpha 700 body. The broad zoom ring falls readily to hand, however the manual focus ring simply doesn't work very well due to its short travel; this is especially problematic when coupled with the tiny viewfinders of the Alpha 300 and 350 camera bodies, and on these cameras critical manual focusing becomes practically impossible.
Autofocus is driven by a screw-drive system from the camera body, so AF speed, noise and accuracy is fundamentally dependant on the camera used. On our Alpha 700 and 350 test bodies, we found focusing to be generally fast and accurate under most conditions, although with a certain tendency to struggle a bit in low light, especially at the telephoto end with its slow maximum aperture of F5.6.
Lens body elements
Reported aperture vs focal length
Here we show the maximum and minimum apertures reported by the camera at the marked focal lengths.
|First, Let me check its expiry date. by rajeev22675|
from Best Photo of the Week
|Dairy Way by BodkinsBest|
from Best Astrophotography Landscape #4
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