Move up to a pro-level DSLR like those from Canon and Nikon and you’re inundated with buttons. Once you know what they all do and spend hours learning the layout, they feel like second nature, but the physical interface is imposing. The IQ4 150, however, is the opposite. There are four generic, rectangular buttons flanking the screen. Two control wheels give you access to common functions like adjusting aperture and shutter speed. There’s a power button and, well, not much else.