Comparison of Canon EF 28-90mm f/4-5.6 II USM and Pentax SMC P-FA 28-90mm f/3.5-5.6

Attribute	Canon EF 28-90mm f/4-5.6 II USM ×	Pentax SMC P-FA 28-90mm f/3.5-5.6 ×
Front Element Rotation	-	-
Closest Focus (m)	0.38	0.4
Length (mm)	71	69
Focus Details	USM	-
Zoom System	Rotary	Rotary
Diaphragm Blades	5	-
Image Circle	35mm	35mm
Aperture (f)	4.00 - 32.00	3.50 - 38.00
Name	Canon EF 28-90mm f/4-5.6 II USM	Pentax SMC P-FA 28-90mm f/3.5-5.6
Brand	Canon	Pentax
Weight (g)	190	196
Type	Standard Zoom	Standard Zoom
Lens Construction	10 elements in 8 groups, including 1 aspherical element	8 elements in 10 groups
Magnification Ratio (x)	0.3	0.28
Focal Length (mm)	28.00 - 90.00	28.00 - 90.00
Filter Size (mm)	58	58
APS Equivalent	45 - 144mm	42 - 135mm
Diagonal Angle of View (degree)	27.00 - 75.00	27.00 - 75.00
Diameter (mm)	67	66