The Improved Scan-580 MK2 is with the updated electronic reset, X/Y movement is very smooth the optics are much brighter with better contour design. Scan580MK2 is a versatile scanner with a host of functions including motorized focus and 3 types of prisms, They are very compact and offer brilliant effects. These scanners are very reliable and the internal construction is very sturdy, All the Gobos are replaceable. This is offered at a fraction of a cost of much more competing brands.