Andy Westlake tries out Panasonic’s mid-range weather-sealed standard zoom lens
Panasonic Lumix G Vario 12-60mm f/3.5-5.6 Asph Power OIS review: Resolution, shading and curvilinear distortion
Central sharpness is very good at all focal lengths, although the corners lag behind a bit, most markedly at 12mm. In general, best results are obtained around f/5.6-f/8. The lens can be stopped down to f/22, but personally I’d stop at f/11. Beyond this, diffraction blurring becomes excessive.
As tends to be the case on Micro Four Thirds, vignetting is practically a non-issue. It’s only worth commenting on at wideangle, and even here there’s only a relatively minor drop-off in illumination in the corners of 0.6EV at f/3.5. When you stop the lens down to f/5.6, however, this essentially disappears.
As is Panasonic’s way, distortion is corrected seamlessly in software, leaving behind very mild barrel distortion at wideangle that you’ll barely see. Go out of your way to produce uncorrected raw files and you’ll see quite considerable barrel distortion at 12mm and a little pincushion at 60mm, but this is essentially academic.