Comparison of Pentax 50mm f/1.4 SDM AW HD D FA* and Tokina 50mm f/1.4 FF Opera

Attribute	Tokina 50mm f/1.4 FF Opera ×	Pentax 50mm f/1.4 SDM AW HD D FA* ×
Notes	Dust & weather resistant sealing; For Canon EF and Nikon F-mount; Bayonet type lens hood included.	Dustproof, weather-resistant construction; Electromagnetic diaphragm
Magnification Ratio (x)	-	0.18
Filter Size (mm)	72	72
Focus Details	Internal via ring-shaped ultrasonic motor; Full-time manual focus override	Ring-type SDM (Supersonic Direct-drive Motor)
Closest Focus (m)	0.4	0.4
Lens Construction	15 elements in 9 groups, including 1 aspherical and 3 SD (Super-low Dispersion) elements; ELR (Extremely Low Reflection) Coating	15 elements in 9 groups, including 3 SLD (Super Low Dispersion) glass elements and 1 aspherical element
Length (mm)	107.5	106
Focal Length (mm)	50.00	50.00
APS Equivalent	1.5x: 75mm 1.6x: 80mm	75mm
Brand	Tokina	Pentax
Image Circle	35mm	35mm
Name	Tokina 50mm f/1.4 FF Opera	Pentax 50mm f/1.4 SDM AW HD D FA*
Weight (g)	950	910
Type	Standard Prime	Standard Prime
Aperture (f)	1.40 - 16.00	1.40 - 16.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	47.40	47.00
Diameter (mm)	80	80