Review: Panasonic Lumix G X Vario 12-35mm f/2.8
High picture quality across all of the apertures
During the test, I wanted to focus on the functionality of the lens in different situations, in order to get an idea of the lens as a tool. I didn’t shoot any clinical studio test shots, just a bunch of pictures with different apertures across the zoom range.
These photos do not meet any scientific or artistic standard, but they confirm my perception of the quality of the lens. With the Panasonic Lumix GX Vario 12-35 mm lens, you don’t have to worry too much about the aperture setting. Quality differences between different apertures are hard to see, although corners do show some softness at full aperture. The difference, however, is so small that I think it is not practically of any importance. Also, vignetting and chromatic aberrations remain well under control at all apertures.
Optical distortions occur to some extent, as would be expected of such a zoom lens. In practical shooting situations I noticed that in the wide-angle end there is some barrel distortion, and some pincushion distortion in the telephoto end. Wide-angle barrel distortion is a little easier to spot, and may be distracting in photographs with a lot of straight lines. In practice, however, these situations were rare.
The following pictures provide an idea regarding how the optics perform with different apertures. Images are treated neutrally from the original raw files in Adobe Lightroom (just a small amount of Detail Sharpening with values of 25-1.0-25-0) without any sharpening in the export stage. Afterwards, they have been opened in OS X’s preview windows side by side, zoomed 1:1 with a 15-inch Retina MacBook Pro, and captured as PNG images. Click to open larger images.
Below you can see both pictures with full aperture of f/2.8 for comparison. Click to open larger images.