
Pentax KP + Pentax 50mm f/1.4 vs. Pentax 55mm f/1.4 DA lens test: https://www.youtube.com/watch?v=F1iNWHXePiU https://www.youtube.com/watch?v=4x2osY-vLoE https://www.youtube.com/watch?v=3s1luK0Dp5E Pentax 50mm f/1.4 vs. Pentax 43mm f/1.9 limited series: