Comparison of Canon EF 28-90mm f/4-5.6 III and Pentax SMC P-FA J 28-80mm f/3.5-5.6 AL

Attribute	Canon EF 28-90mm f/4-5.6 III ×	Pentax SMC P-FA J 28-80mm f/3.5-5.6 AL ×
Brand	Canon	Pentax
Name	Canon EF 28-90mm f/4-5.6 III	Pentax SMC P-FA J 28-80mm f/3.5-5.6 AL
Focal Length (mm)	28.00 - 90.00	28.00 - 80.00
Image Circle	35mm	35mm
Diaphragm Blades	5	-
APS Equivalent	45 - 144mm	42 - 120mm
Closest Focus (m)	0.38	0.4
Length (mm)	71	66
Filter Size (mm)	58	58
Magnification Ratio (x)	0.3	0.25
Aperture (f)	4.00 - 32.00	3.50 - 38.00
Diagonal Angle of View (degree)	27.00 - 75.00	30.50 - 75.00
Zoom System	Rotary	Rotary
Weight (g)	190	179
Lens Construction	10 elements in 8 groups, including 1 aspherical element	8 elements in 8 groups
Type	Standard Zoom	Standard Zoom
Diameter (mm)	67	64