Compared to the 5D Mark I unsealed Canon promises an improved weather protection on the 5D Mk II and 50D, for example by seals the battery compartment door on the CF card compartment, and some control buttons and the camera monitor. In addition to improved mass housing gap almost make the weather suitable level of the analog professional camera EOS 1N. The 1Ds III with full rubber seals should, however, prolonged bad weather operations have grown the most.
Canon EOS 5D Mark III
The established concept of the newer two-digit and Canon DSLR models is also maintained on the 5D Mark II, with a large and multi-control dial with one hand most of the functions set quickly. Even the menu is divided into tabs clear, while the 5D Mark I needed to make some entries longer scroll maneuvers. 5D Mark I experienced users, however, are quick with the old system also move. The new quick set-screen of the EOS 5D Mark II (also EOS 50D), however, is a nice and clear addition to alterations at particular values in low light with the multi-controller, combined with the Main Dial. Top left is the somewhat ribbed fine and extended to two custom programs Dial. The latter lacks the 1D and there makes application switching via push button and rotating the Main Dial-consuming.
The AF-On button to enable the 5D Mark II and 50D to autofocus during Live View operation. Would be desirable to control the optional live autofocus means press the shutter. Focusing remotely trigger is therefore subject to special solutions that can simulate the AF-On button. The EOS 1Ds Mark III uses the AF-On button on the other hand the purpose of focusing aid as an alternative to the halfway pressed shutter button especially problematic in action situations.