Comparison of Sigma 100-400mm f/5-6.3 DG DN OS Contemporary and Tamron 100-400mm f/4.5-6.3 Di VC USD (Model A035)

Attribute	Tamron 100-400mm f/4.5-6.3 Di VC USD (Model A035) ×	Sigma 100-400mm f/5-6.3 DG DN OS Contemporary ×
Aperture (f)	4.50 - 45.00	5.00 - 29.00
Filter Size (mm)	67	67
Notes	Available mounts: Canon EF, Nikon F; Optical Image Stabiliztion (CIPA: 4 stops); Moisture-Resistant Construction	Available AF Mounts: Leica L-mount, Sony E-mount; Image Stabilized; Mount with dust- and splash-proof design; Compatible with Mount Converter MC-11
Closest Focus (m)	1.5	1.1
Magnification Ratio (x)	0.28	0.24
Diameter (mm)	86.2	86
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 150 - 600mm; 1.6x: 160 - 640mm	1.5x: 150 - 600mm
Diaphragm Blades	9	9
Image Circle	Image Circle	35mm
Focal Length (mm)	100.00 - 400.00	100.00 - 400.00
Brand	Tamron	Sigma
Name	Tamron 100-400mm f/4.5-6.3 Di VC USD (Model A035)	Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
Weight (g)	1135	1135
Diaphragm Blades Type	circular	rounded
Lens Construction	17 elements in 11 groups, including 3 LD (Low Dispersion) elements; eBAND coating; Fluorine coating	22 elements in 16 groups, including 1FLD and 4 SLD elements
Zoom System	Rotary	Rotary (with Zoom Lock)
Length (mm)	199	197.2
Diagonal Angle of View (degree)	6.20 - 24.40	-
Focus Details	Internal; USD (Ultrasonic Silent Drive) motor	Internal; HSM with full-time manual override