Digital Photo Processes
Lens sharpness comparison
The lenses for the Lumix and Leica camera models that are investigated here have been manufactured by Panasonic. The question is about their specifications. Do the Leica models have lenses with tighter tolerances than the Lumix models? In some test shots I noticed that the Leica D-Lux 3 gave a blurrier picture at the edge than the Lumix LX2. The cameras were tripod mounted, no image stabilization, manual focus to infinity, 2 second shutter delay. So there was no motion blur. I took multiple landscape pictures with all four cameras. Their sharpness distribution over the picture area did not change significantly with focal length or aperture used. Seeing how the gravel roof also showed the lack of sharpness, I decided to take four close-up pictures of sand paper, one for each camera.
In all cases the exposure time was 1/13 s, the aperture f:3.2 at ISO 100. The focal length was 9.2 mm for the large cameras and 8.7 mm for the small ones. The RAW files were processed in ACR with its default settings. Thus there is minimal Sharpening applied (25, 1.0, 25, 0) and Noise Reduction 0 for Luminance and 25 for Color. So these pictures should only be evaluated relative to each other and not for optimum sharpness. The center of the image was always the sharpest region. The lower right corner was the worst for all four cameras, which is probably a coincidence.
- 2 and 5 are about the same with a slight edge for the D-Lux
I do not see systematic differences between Leica and Lumix models. The pictures here probably show production variations.
For a summary see the Lumix & Leica page.