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Lens review

Panasonic Leica DG Summilux 25 mm f/1.4 ASPH.

5 September 2011
Szymon Starczewski

8. Vignetting

Because of the distortion correction RAW images have a bit wider field of view than JPEG images. That’s why their vignetting measurement results can differ slightly. In the case of JPEG files, at the maximum relative aperture, the vignetting is significant, amounting to as much as 49% (-1.95 EV). For a small 4/3 sensor it is a high result. It’s enough to remind you here that the Leica 1.4/25 for 4/3 had a result by 11% lower. However, when we mention the pranks of the Canon EF 1.4/50, which was able to reach the level of 72%, we can maintain proper detachment allowing to assess the results correctly. Especially that, already by f/2.0 the vignetting decreases to the value of 25% (-0.83 EV) and by f/2.8 it becomes imperceptible (8%).

In the case of the RAW format, at the maximum relative aperture, we got the same result, within the margin of error, as for JPEG files. By f/2.0 and f/2.8 RAW files results were by about 5-7% higher than those of JPEG files.

JPEG RAW
f/1.4 f/1.4
Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting
f/2.0 f/2.0
Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting
f/2.8 f/2.8
Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting

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Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Vignetting