Image Resource devised a torture test for the Sony a7RIII, Nikon D850, Canon 5D Mark IV and Olympus OM-D EM1 that simulates a moderate downpour and while all the cameras survived the a7RIII didn’t perform optimally. The a7RIII had water in the battery compartment after the rain test and it started randomly firing in the off position after the mist test, but the camera returned to normal after being aired out you can read more about it in Image Resources writeup.
This is very bad news for photographers that like to shoot in the rain and I really would have like to have seen a GFX in the mix for this test, because as well as the competitors performed the Fujifilm GFX is probably right up there with the Olympus OMD. Well built mirrorless cameras should have an advantage at this kind of test and it also would have been nice to have a Sony a9 involved in this testing for good measure. Sony’s weather sealing has improved marginally over the years, but they still have a long way to go.
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