The EOS-1D Mark II N incorporates a number of user-requested improvements such as an interchangeable matte focusing screen for critical focus in low light. ISO values can now be changed in the viewfinder, allowing the photographer to change settings without taking the camera from their eye. The1D Mark II N has two memory card slots, one for CompactFlash (CF) and one for Secure Digital (SD) memory, and has the ability to record JPEG and RAW images on different memory cards, simultaneously. These improvements, plus all the shooting modes of the EOS 1 line and shutter speeds from 1/8000 to 30 sec. and bulb make it clear that the1D Mark II N is an incredibly adaptable photographic tool.