Introduced late February 2007, the Pentax SMC-DA* 60-250mm f/4 ED IF SDM lens was designed for Pentax DSLRs with APS-C size sensors. It houses the designated SDM ultrasonic motor for fast and smooth autofocusing. The lens has 92-383mm equivalent field of view with f/4 max aperture permitting relatively fast shutter speeds considering its effective depth of field mimics that of an f/5.6 full format lens. Its lens construction consist of 15 elements in 13 groups, 3.60' minimum focusing distance, SP coating for easy cleaning while repelling moisture, dust, and oil base substance, and quick-shift focus. The SMC-DA*60-250mm SMC ED IF offers a striking zoom range and telephoto range perfect for that sports or nature photographer.