Comparison of Sigma 70mm f/2.8 DG Macro Art and Tamron 90mm f/2.8 Di MACRO 1:1 VC USD SP (Model F004)

Attribute	Tamron 90mm f/2.8 Di MACRO 1:1 VC USD SP (Model F004) ×	Sigma 70mm f/2.8 DG Macro Art ×
Filter Size (mm)	58	49
Notes	Available mounts: Canon, Nikon, Sony; Optical Image Stabilization; Included Accessories: Lens hood.	Available AF Mounts: Sigma SA, Canon EF, L-Mount, Sony E; Dust- and splash-proof construction
Closest Focus (m)	0.3	0.26
Magnification Ratio (x)	1	1
Type	Telephoto Prime Macro	Telephoto Prime Macro
Length (mm)	122.9	105.8
APS Equivalent	1.5x: 135mm; 1.6x: 144mm	1.5x: 105mm; 1.6x: 112mm
Diagonal Angle of View (degree)	27.00	34.30
Image Circle	Image Circle	35mm
Focal Length (mm)	90.00	70.00
Brand	Tamron	Sigma
Name	Tamron 90mm f/2.8 Di MACRO 1:1 VC USD SP (Model F004)	Sigma 70mm f/2.8 DG Macro Art
Weight (g)	550	515
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	14 elements in 11 groups, including 2 XLD (Extra Low Dispersion) glasses and one LD (Low Dispersion) elements	13 elements in 10 groups, including 2 aspherical elements, 2 FLD glass elements, 2 SLD glass elements, and one element with a high rate of anomalous
Diameter (mm)	76.4	70.8
Focus Details	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism	Internal with focus-by-wire system using coreless DC motor; full-time manual override (see release text)