Panasonic Lumix G VARIO 14-42 f3.5-5.6 II Asph. Mega OIS review - The Cheapest ‘Standard Zoom’ for Micro 4:3 and Surprisingly GoodBy Ben Boswell - Thursday April 04 2013 Lens Review
The scores achieved by Micro 4:3 lenses are, as a whole, not very high, so this score is relatively good: the second highest zoom lens tested by DxOMark on the Lumix DMC GH2.
The variations in the results from wide angle to tele for Distortion are quite pronounced, with very good correction at the long end of the scale, but noticeable barrel distortion when used at 14mm. This is no real surprise, as other zoom lenses in this category perform similarly.
In common with other lenses for cameras with quite small sensors, the 14-42mm is not able to deliver when it is stopped down. The sharpness score of 7P-Mpix is achieved with the aperture wide open: f/3.5 at 14mm. At f/8, throughout the zoom range the sharpness has dropped to around 5P-Mpix. The lack of sharpness is probably due to diffraction, but it is a pity that so much of the possible range of settings will produce relatively poor resolution.