Buhl Mark IV Opus 1440w Opaque Projector Mark IV Opus The Buhl Mark IV OPUS 4 is the ideal projector for non-transparent materials such as original documents, books, magazines and even thin 3-Dimensional solid objects. The NEW illumination system with 4 halogen reflectors enables sufficient light output * Only $1146.73 when you use coupon code - WIN10 - in the shopping cart