It does have a lot less noise than the 5D2. I shot an event at our church earlier this year and rented a 5D4 and I was able to use my 100-400 indoors at f/7.1 or f/8 with decent shutter speeds (faster than 1/400 when I was at 400mm) at ISO 12800. The images had about the same amount of noise as the 5D2 at ISO 3200. The noise on the 5D4 at higher ISOs looks more like film grain than the noise on my 5D2 and 20D.....
Oh, no doubt. The noise characteristics of the 5DII are nothing to brag about but it's very usable to about ISO 6400 and I so rarely even go above 3200 that the better noise handling is wasted on me. But if the 5DIV falls to below $2500, I'm on it in a moment. I need it's better DR as low ISO.




