Originally posted by Pablo Villegas Thanks, I know that slide film is like that, but slide film has a 5 stop dynamic range, not 12, like this camera.
It's the principle that counts, you really want to nail exposure on this camera while avoiding clipping, although CCD sensors tend to "blow out" more gracefully then CMOS in instances where it's inescapable.
In terms of DR it's pretty much exactly like my 5Dmk2 was, only without the pattern noise in the shadows, so shadow recovery was more viable. But unlike the 5D, which had a good 1+ stops in the highlight region, you'll be lucky to get much highlight headroom on the D. The Z acts the exact same way, btw, all of the DR is in the shadows, and if you clip highlights the most you can hope for is 10% recovery in Lightroom before it just starts filling in with a flat color.
Just like the 5D, the 645D is also ISO variant, which means you should always raise ISO to get a good exposure instead of pushing in post, or you lose DR.