Pentax HD FA 50mm f1.4 Category_Extension Tubes the performance difference can be

the performance difference can be substantial

which enables you to shoot beautiful and sharp photos of small subjects

low-dispersion glass to minimize chromatic aberration

Two DDSSM (Direct Drive SSM) systems employing original Sony piezoelectric motors directly drive two focus groups in a floating focus configuration

only locking everything down once everything’s ready

Pentax HD FA 50mm f1.4 Category_Extension Tubes the performance difference can beThe HD PENTAX FA 50mm f1. 4 is a single focus standard lens features the latest, high grade, multi layer HD Coating, which effectively reduces the generation of flare and ghost image to deliver clear, high contrast images of the subject, even in demanding lighting conditions such as backlighting. Designed as an interchangeable lens for use with PENTAX K mount digital SLR cameras, its larger diameter optics cover the full frame image circle of K mount