« Last post by docsmith on Today at 07:39:18 AM »
I am a 5DIII owner and borrowed the 5DIV for a few days. I would agree that it is slightly better in most ways. The battery drain issue does seem to be real, where the 5DIII has better battery life.
The biggest advantages of the 5DIV over the 5DIII that I noticed were lowlight focusing, weight (noticeably lighter), better auto WB, and I do like the shutter/mirror slap sound of 5DIV better. It is quieter. I have also seen people pull more detail out of shadows, but, in the shots I took where I tried to view the benefits of extended DR, the 5DIII actually did pretty well, but the 5DIV was better and I do occasionally see banding issues with my 5DIII.
So, overall, the 5DIV is a better camera, except for the battery life. But the 5DIII is an amazing camera in its own.
For a third camera, mostly aimed at lower weight, if you think of cameras as tools, I'd probably save the money and go for the 5DIII. If you liked to geek out with the latest gear, then go with the 5DIV, it is better, and, maybe most importantly, just a bit lighter.
So far, I am staying with my 5DIII. And the further we get from the release of the 5DIV and the more shots I take where I wouldn't have needed the 5DIV features the less tempted I am to upgrade.