To keep the test as pure as possible, all the test shots were taken as DNG files, then transferred and opened in Adobe Photoshop 2020 with Camera Raw 12.3 (which has native M10-R support) into JPEG files with no corrections or adjustments to the default image settings. The images were focused by rangefinder and confirmed by live view for each camera, and the distance setting of the lens was indistinguishable when mounted to each of the two cameras. The test shots were taken in one sitting, with the same tripod position ~1.3 m from the target, and under the same lighting. To the best of my ability, the M10-P and the M10-R were treated equally. The ISO value and shutter speeds were as follows: The aperture was set to f/5.6 for all tests, at which the resolving power of the 50 APO is about as high as possible among commercially available 35-mm format lenses.
The same Leica 50 APO lens was used for all tests. Methodology: all shots were taken on a tripod with a 2-second delay to minimize vibration. The firmware version for both was the latest firmware currently available to the public: 10.20.27.20 for the M10-R (upgraded from the initial released 10.20.23.49 firmware that was pre-installed in the new camera), and 2.7.5.0 for the M10-P. I obtained a customer-release-not pre-release/beta-M10-R and compared it side-by-side with the M10-P on a test scene. Leica M10-R vs Leica M10-P ISO sweep, acuity, and noise side-by-side comparisonīy Onasj ( see previous articles by Onansj)
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