Comparison of Zeiss 135mm f/2 Milvus 2/135 and Sigma 135mm ƒ/1.8 DG HSM Art

Attribute	Sigma 135mm ƒ/1.8 DG HSM Art ×	Zeiss 135mm f/2 Milvus 2/135 ×
Filter Size (mm)	82	77
Notes	Available AF Mounts: Sigma SA, Canon EF, L-Mount, Nikon F, Sony E; Dust- and splash-proof construction; Compatible with Mount Converter MC-11	Available lens mounts: Canon EF (ZE), Nikon F (ZF.2); Weather-sealed construction to protect against dust and moisture; Hood and lens caps included.
Closest Focus (m)	0.88	0.8
Magnification Ratio (x)	0.2	0.25
Type	Telephoto Prime	Telephoto Prime
Length (mm)	114.9	114
APS Equivalent	1.5x: 202.5mm; 1.6x: 216mm	1.5x: 202.5mm; 1.6x: 216mm
Diagonal Angle of View (degree)	18.20	18.70
Image Circle	35mm	35mm
Focal Length (mm)	135.00	135.00
Brand	Sigma	Carl-zeiss
Name	Sigma 135mm ƒ/1.8 DG HSM Art	Zeiss 135mm f/2 Milvus 2/135
Weight (g)	1130	1059
Aperture (f)	1.80 - 16.00	2.00 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	13 elements in 10 groups	11 elements in 8 groups, including 4 Anomalous Partial Dispersion elements; Enhanced Zeiss T* anti-reflective coating
Diameter (mm)	91.4	89.7
Focus Details	Internal with HSM (Hypersonic Motor) with limiter and full-time manual override	Manual focus only