Comparison of Canon EF 35-80mm f/4-5.6 III and Pentax SMC P-FA 28-90mm f/3.5-5.6

Attribute	Pentax SMC P-FA 28-90mm f/3.5-5.6 ×	Canon EF 35-80mm f/4-5.6 III ×
Aperture (f)	3.50 - 38.00	4.00 - 32.00
Magnification Ratio (x)	0.28	0.23
Filter Size (mm)	58	52
Front Element Rotation	-	-
Closest Focus (m)	0.4	0.4
Lens Construction	8 elements in 10 groups	8 elements in 8 groups, including 1 aspherical element
Length (mm)	69	63.5
Focal Length (mm)	28.00 - 90.00	35.00 - 80.00
APS Equivalent	42 - 135mm	56 - 128mm
Brand	Pentax	Canon
Image Circle	35mm	35mm
Name	Pentax SMC P-FA 28-90mm f/3.5-5.6	Canon EF 35-80mm f/4-5.6 III
Weight (g)	196	175
Type	Standard Zoom	Standard Zoom
Diagonal Angle of View (degree)	27.00 - 75.00	30.00 - 63.00
Diaphragm Blades	-	5
Zoom System	Rotary	Rotary
Diameter (mm)	66	65