Comparison of Canon EF-S 10-22mm f/3.5-4.5 USM and Tamron 17-28mm f/2.8 Di III RXD (Model A046)

Attribute	Tamron 17-28mm f/2.8 Di III RXD (Model A046) ×	Canon EF-S 10-22mm f/3.5-4.5 USM ×
Filter Size (mm)	67	77
Notes	Available mounts: Sony FE-mount; Moisture-resisteant construction	EF-S lens mount, exclusively for EOS 20D, Digital Rebel, and newer bodies with APS-C sensors.
Closest Focus (m)	0.19	0.24
Magnification Ratio (x)	0.19	0.17
Diaphragm Blades Type	circular	-
Type	Wide Zoom	Wide Zoom
APS Equivalent	-	16 - 35mm
Zoom System	Rotary	Rotary
Image Circle	Image Circle	APS-C
Focal Length (mm)	17.00 - 28.00	10.00 - 22.00
Brand	Tamron	Canon
Name	Tamron 17-28mm f/2.8 Di III RXD (Model A046)	Canon EF-S 10-22mm f/3.5-4.5 USM
Weight (g)	420	385
Aperture (f)	2.80 - 22.00	3.50 - 22.00
Diaphragm Blades	9	6
Diagonal Angle of View (degree)	76.40 - 104.70	63.50 - 107.50
Lens Construction	13 elements in 11 groups, including 2 LD (Low Dispersion), 1 XLD (Extra Low Dispersion) and 3 aspherical elements	13 elements in 10 groups, including 3 aspherical and 1 S-UD elements
Diameter (mm)	73	83
Length (mm)	99	90
35mm Equivalent	1.5x: 25.5 - 42mm; 1.6x: 27.2 - 44.8mm	-
Focus Details	Internal via RXD (Rapid eXtra-silent stepping Drive) with DMF (Direct Manual Focus)	Inner focusing; full-time manual focus and USM