Sigma 50 f/1.4 HSM Hunting on a Pentax K20D

Sigma 50 f/1.4 HSM Hunting on a Pentax K20D Tube. Duration : 0.10 Mins.

Another cinematographic masterpiece.

Keywords: Pentax, K20D, Sigma, 50, 1.4, HSM, hunting, autofocus, AF, test, speed, pentaxlan