Comparison of Sigma 70mm f/2.8 EX DG Macro and Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)

Attribute	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) ×	Sigma 70mm f/2.8 EX DG Macro ×
Filter Size (mm)	62	62
Notes	Available mounts: Canon EF, Nikon F, Sony A; Optical Image Stabilization (3.5 stops); Weather resistant; Compatible with TAMRON TAP-in Console	Available AF Mounts: Sigma, Canon, Nikon, Sony, Pentax; Included Accessories: Lens Hood
Closest Focus (m)	0.3	0.26
Magnification Ratio (x)	1	1
Type	Telephoto Prime Macro	Telephoto Prime Macro
Focus Details	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism	Floating focus system; Focus Limiter Switch
APS Equivalent	1.5x: 135mm; 1.6x: 144mm	1.5x: 105mm; 1.6x: 112mm
Diameter (mm)	79	76
Image Circle	35mm	35mm
Focal Length (mm)	90.00	70.00
Brand	Tamron	Sigma
Name	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)	Sigma 70mm f/2.8 EX DG Macro
Weight (g)	610	525
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	27.00	34.30
Length (mm)	116.8	95
Diaphragm Blades Type	rounded	-
Lens Construction	14 elements in 11 groups, including 2 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings	10 elements in 9 groups, including SLD elements