The 50mm class of Legend Ultra HD scopes embody the best of the newest generation of super-compact spotters, perfect for most nature observation and even some digiscoping use in bright light.  They're small enough to tote along with a binocular doing primary duty, and perfect for use from a car window.  The 50mm Legend can even be handheld for a bit at its lower magnifications, something the full size scopes cannot come close to doing practically.