Comparison of Canon EF 50mm f/2.5 Compact Macro and Pentax SMC P-D FA 50mm f/2.8 Macro

Attribute	Canon EF 50mm f/2.5 Compact Macro ×	Pentax SMC P-D FA 50mm f/2.8 Macro ×
Type	Standard Prime Macro	Standard Prime Macro
Name	Canon EF 50mm f/2.5 Compact Macro	Pentax SMC P-D FA 50mm f/2.8 Macro
Weight (g)	280	265
Image Circle	35mm	35mm
Brand	Canon	Pentax
APS Equivalent	80mm	75mm
Focal Length (mm)	50.00	50.00
Lens Construction	9 elements in 8 groups	8 elements in 7 groups
Diaphragm Blades	6	8
Magnification Ratio (x)	0.5	1
Closest Focus (m)	0.23	0.2
Filter Size (mm)	52	49
Aperture (f)	2.50 - 32.00	2.80 - 32.00
Diagonal Angle of View (degree)	46.00	47.00
Diameter (mm)	68	67.5
Length (mm)	63	60