Comparison of Sigma 28mm f/1.4 DG HSM Art and Tamron 35mm f/1.4 Di USD SP (Model F045)

Attribute	Sigma 28mm f/1.4 DG HSM Art ×	Tamron 35mm f/1.4 Di USD SP (Model F045) ×
Aperture (f)	1.40 - 16.00	1.40 - 16.00
Filter Size (mm)	77	72
Notes	Available AF Mounts: Canon EF, L-Mount, Nikon F, Sigma SA and Sony E; Compatible with Sigma's USB Dock and Mount Conversion Service	Moisture-resistant construction; Available mounts: Canon EF, Nikon F; Included Accessories: Flower-shaped hood, caps, pouch.
Closest Focus (m)	0.28	0.3
Magnification Ratio (x)	0.19	0.2
Diameter (mm)	82.8	80.9
Type	Wide Prime	Wide Prime
APS Equivalent	1.5x: 42mm; 1.6x: 44.8mm	-
Diaphragm Blades	9	9
Image Circle	35mm	Image Circle
Focal Length (mm)	28.00	35.00
Brand	Sigma	Tamron
Name	Sigma 28mm f/1.4 DG HSM Art	Tamron 35mm f/1.4 Di USD SP (Model F045)
Weight (g)	865	815
Diaphragm Blades Type	rounded	circular
Lens Construction	17 elements in 12 groups, including 2 FLD, 3 SLD and 3 aspherical elements	14 elements in 10 groups, including 4 LD (Low Dispersion) and 3 GM (Glass Molded) aspherical elements; BBAR-G2 coating; Fluorine coating
Diagonal Angle of View (degree)	75.40	63.40
Length (mm)	107.7	104.8
35mm Equivalent	-	1.5x: 52.5mm; 1.6x: 56mm
Focus Details	HSM (Hypersonic Motor) with full-time manual focus override	Internal with USD (Ultrasonic Silent Drive); Continuous manual focus mechanism