Digital cameras: Canon EOS 7D Digital vs. Canon EOS-1 D Mark IV

In my personal experience,

I already tested 7D although I've not yet got to see any 1D IV yet. The 2 camera serve quite many different purposes. 1D series is more flexible and contains more features for professionals who demand speed and accuracy. The new focusing system is something different from 7D ; I'd say much faster and more features. For example, when rotating 1D mark IV while shooting, you can choose any focusing points and types you want, along with more cross type focusing points - from left to right, top to bottom. 7D certainly isn't capable of doing this.

Moreover, the buffer size of 1D allows you continuously shoot pictures so that you won't miss any demanding shot. Look at the amount of pictures when shooting at burst mode ( 15 RAW for 7D and 28 RAW for 1D ) for professionals the number is very important that they won't miss any action shot.

I've not yet mentioned many features, such as shooting many 1D camera and maintaining the same settings for every camera. This is only for 1D series. You can set the camera parameters, save into your memory card, and reload to another 1D camera. Another more professional feature, FEL light metering features which evaluate light condition of chosen multi-spots ( as many as 9 points ). Then, the light condition will be evalulated for any desire shot. These are some features I found out from my 1Ds mark III which I'd say that 1D mark IV has all and improve these features.

There are more features and functions in 1D mark IV that I've not got any chance to explore. But, the professionals and serious ametuers demands are quite different. So, you be the judge for how serious you are and what you really want. Specification isn't just something you say whether the camera is worth that. Dig deep and find out !