Our good friend Roger Cicala over at Lensrentals finally got around to tearing down the Sony a7R III, to see if Sony was being honest when it claimed the newest a7R was much better weather sealed than its predecessor. The results? Well, it's a "good news, bad news" situation. Yes, Sony was being truthful... but it screwed up in one major place.

You can see the full teardown over on the Lensrentals blog—Roger tears the thing all the way down, even giving us a great look a the IBIS system and how far the sensor can travel—but the TL;DR version goes something like this:

Sony weather sealed most of this camera very well, much better than its predecessor. BUT, for some reason, Sony left the bottom of this camera extremely vulnerable to water. You can see just how vulnerable in the gallery above. Or, if you prefer words, here's Roger's conclusion:

Sony spoke truly. Except for the bottom this camera has thorough and extensive weather sealing, as good as any camera I’ve seen. (Before you Pentax guys start, I have not taken apart a Pentax so it may be completely sealed in a super glue matrix for all I know.)

That being said, the bottom of the camera is not protected worth a damn. If you’re out in a sprinkle or shower, this probably doesn’t matter; water hits the top first. But if you’re in severe weather, near surf, or might set your camera down where someone might spill something, you need to be aware of that.

To read the full conclusion, scroll through the entire teardown, and see just how many rubber gaskets and foam pieces Sony added to the a7RIII to keep it safe from inclement weather, head over to the Lensrentals blog.