Quote:The entrance pupil on this one is 17.5mm, as compared to the 9.8mm entrance pupil on the typical 18-55. It also focuses internally and features a better stabilizer. All of the zoom motions must also happen in front of the aperture stop, placing further restrictions on the design, while having a wider zoom range (4.3x vs 3x).
The performance is poor and it is expensive, but this thing is much more complicated than the standard 18-55.
How do you explain a lens such as the Sigma 17-70 f/2.8-4.0 DC tested at the Zone here is much better in pretty much any respect:
- Almost same focal range
- Faster/brighter
- Half price (sells for $500)
- Much better optical performance at all focal lengths and apertures
- Features a speudo-macro mode (very useful) at 1:2.7
- Like the Sony, features OIS