Comparison of Sigma 105mm f/2.8 DG DN Macro and Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)

Attribute	Sigma 105mm f/2.8 DG DN Macro ×	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) ×
Filter Size (mm)	62	62
Notes	Available AF Mounts: Sony E-Mount, L-mount; Dust- and splash-proof construction; Compatible with USB Dock UD-11 (L-mount only)	Available mounts: Canon EF, Nikon F, Sony A; Optical Image Stabilization (3.5 stops); Weather resistant; Compatible with TAMRON TAP-in Console
Closest Focus (m)	0.29	0.3
Magnification Ratio (x)	1	1
Type	Telephoto Prime	Telephoto Prime Macro
Length (mm)	133.6	116.8
APS Equivalent	1.5x: 157.5mm	1.5x: 135mm; 1.6x: 144mm
Diagonal Angle of View (degree)	23.30	27.00
Image Circle	35mm	35mm
Focal Length (mm)	105.00	90.00
Brand	Sigma	Tamron
Name	Sigma 105mm f/2.8 DG DN Macro	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)
Weight (g)	715	610
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 12 groups, including 1 SLD glass elements	14 elements in 11 groups, including 2 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings
Diameter (mm)	74	79
Focus Details	Internal with HSM (Hypersonic Motor); full-time manual override	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism