Comparison of Sigma 85mm ƒ/1.4 EX DG HSM and Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016)

Attribute	Sigma 85mm ƒ/1.4 EX DG HSM ×	Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016) ×
Filter Size (mm)	77	67
Notes	Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony. Included Accessories: Case, Lens Hood, Hood Adapter.	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)	0.85	0.8
Magnification Ratio (x)	0.12	0.14
Type	Telephoto Prime	Telephoto Prime
Length (mm)	87.6	91.4
APS Equivalent	1.5x: 128mm; 1.6x: 136mm	1.5x: 128mm; 1.6x: 136mm
Diagonal Angle of View (degree)	28.60	28.60
Image Circle	35mm	35mm
Focal Length (mm)	85.00	85.00
Brand	Sigma	Tamron
Name	Sigma 85mm ƒ/1.4 EX DG HSM	Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016)
Weight (g)	726	700
Aperture (f)	1.40 - 16.00	1.80 - 16.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	11 elements in 8 groups, including 1 SLD element	13 elements in 9 groups, including 1 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings
Diameter (mm)	84.7	84.8
Focus Details	HSM with A/M Switch	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism