Comparison of Canon EF 40mm ƒ/2.8 STM and Pentax SMC P-FA 43mm ƒ/1.9 Limited

Attribute	Pentax SMC P-FA 43mm ƒ/1.9 Limited ×	Canon EF 40mm ƒ/2.8 STM ×
Magnification Ratio (x)	0.12	0.18
Filter Size (mm)	49	52
Focus Details	Dedicated AF/MF	AF/MF with STM (Stepping Motor Technology)
Closest Focus (m)	0.45	0.3
Lens Construction	7 elements in 6 groups	6 elements in 4 groups, including 1 aspherical element
Length (mm)	27	22.8
Focal Length (mm)	43.00	40.00
Diaphragm Blades Type	-	circular
Brand	Pentax	Canon
Image Circle	35mm	35mm
Name	Pentax SMC P-FA 43mm ƒ/1.9 Limited	Canon EF 40mm ƒ/2.8 STM
Weight (g)	155	130
Type	Standard Prime	Wide Prime ("Pancake")
Notes	Distance scale, Aperture ring, IR index. Included accessories: lens hood, soft case. Available in silver or black.	Optional lens hood: ES-52
APS Equivalent	64.5mm	64mm
Aperture (f)	1.90 - 22.00	2.80 - 22.00
Diaphragm Blades	8	7
Diagonal Angle of View (degree)	53.00	57.00
Diameter (mm)	64	68.2