Photography News | Issue 42 | absolutephoto.com
Camera test 65
Performance: exposure latitude
To assess the EOS M5’s Raws, a +/-4EV manual bracket was made. In Lightroom, the exposures were corrected by the degree they were over or underexposed. The corrected -4EV and -3EV shots showed increased levels of noise but this wasn’t unacceptable given the large amount of correction needed. Tonaiityandcontrast looked good too. The -2EV and -1EV shots corrected perfectly well and almost identical to the correct exposure. The overexposed shots looked less successful after correction. The -4EV shot had flat grey highlights that could be corrected to a degree in Photoshop but garish highlights remained the stumbling block. The same applied to the +3EV where intense highlights had no recoverabledetail. Theoverexposure limit is +2EV if you want acceptable images with highlights with some semblance of detail. In sum, exposure latitude is decent, more so with underexposure and the EOS M5’s Raws are comparablewith its contemporaries.
-1EV
-2EV
-3EV
-4EV
0EV
Original image
+1EV
+3EV
+4EV
+2EV
Images The EOS M5’s control layout is generally good, and there is a reasonable amount of customistation potential. I found being able to turn off the video record button entirely very handy.
The EOS M5 has Chromatic aberration, Peripheral illumination and Diffraction corrections Diffraction is an interesting one and it has appeared on several Canon cameras. Diffraction affects quality at smaller apertures. Light strikes the edges of the diaphragm blades, scattering and creating interference. Diffraction can make a massive impact and if quality is a priority a limit of f/11 is often a good idea. I shot JPEG images using the EOS M5 fitted with the 18-150mm and mounted on a tripod. One shot was at 1/30sec at f/11 and ISO 100, and then two pictures at f/36 and with Diffraction disabled and enabled. Well, the lens’s superior performance at f/11 was clearly evident and the f/36 shots were significantly softer. Was there any benefit using Diffraction correction? On the evidence of this test, with this camera and lens at the settings used, there is no benefit at all but as there is no slowing down of camera performance you might was well leave it enabled.
Original image
F/11 Diffraction Correction off
Performance: Diffractioncorrection
F/36 Diffraction Correction off
F/36 Diffraction Correction enabled
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