Comparison of Canon EF 50mm ƒ/1.8 STM and Pentax SMC P-FA 43mm ƒ/1.9 Limited

Attribute	Canon EF 50mm ƒ/1.8 STM ×	Pentax SMC P-FA 43mm ƒ/1.9 Limited ×
Magnification Ratio (x)	0.21	0.12
Filter Size (mm)	49	49
Focus Details	STM stepper motor for smooth, near silent AF; full-time manual	Dedicated AF/MF
Closest Focus (m)	0.35	0.45
Lens Construction	6 elements in 5 groups; Super Spectra Coating	7 elements in 6 groups
Length (mm)	39.3	27
Focal Length (mm)	50.00	43.00
Diaphragm Blades Type	circular	-
Brand	Canon	Pentax
Image Circle	35mm	35mm
Name	Canon EF 50mm ƒ/1.8 STM	Pentax SMC P-FA 43mm ƒ/1.9 Limited
Weight (g)	159	155
Type	Standard Prime	Standard Prime
Notes	Canon EF mount	Distance scale, Aperture ring, IR index. Included accessories: lens hood, soft case. Available in silver or black.
APS Equivalent	80mm	64.5mm
Aperture (f)	1.80 - 22.00	1.90 - 22.00
Diaphragm Blades	7	8
Diagonal Angle of View (degree)	46.00	53.00
Diameter (mm)	69.2	64