Summary: High-resolution (64MP) and standard-resolution (16MP) images from the Olympus OM-D E-M5 II are compared. The high-resolution images have substantially more fine detail “information” than do the standard-resolution images. That is demonstrably true even when the high-resolution images are down-sampled to 16MP for 1:1 comparison with the standard images. The Olympus high-resolution images are also compared to images from a Sigma DP2 Merrill (14.75MP). Images from both cameras were resampled to dimensions appropriate for making 18-inch-long prints. When viewed on-screen at 100% magnification, the E-M5 II images were clearly superior to the DP2M images. However, when printed, the DP2M images exhibited greater apparent detail. Much of the difference in detail rendition in these comparisons is qualitative rather than quantitative. The E-M5 II high-resolution mode appears to offer considerable advantage if the images are intended for display at large sizes. That advantage must be balanced against the fact that it is appropriate only for tripod shooting of motionless subjects, and the fact that the improved detail is not apparent when images are sized for typical viewing on a computer display.
Key Words: Olympus OM-D E-M5 II, Sigma DP2 Merrill, PhotoZoom Pro, sensor shift, image detail, resolution