Bad news to all of people who already has Four Thirds System digital camera on hand. Because Sigma 50mm F1.4 EX DG HSM the best telephoto lens for Four Thirds System camera is delayed to released this February 11 and will announce the rescheduled on Monday. But you will find Pentax camera which is already carry the same lens with Sigma this January 25 and already scheduled out on Sunday. Sigma 50mm F1.4 EX DG HSM with Ultrasonic AF motor has minimum focusing distance at 0.45m and maximum ratio of 1:7.4 shooting with a circular bladed aperture. Measures about 84.5 × 68.2mm body size and 505g of weigh will sell at cost $674 each unit.