Comparison of Carl Zeiss 50mm f/1.4 Planar T* 1.4/50 and Sigma 65mm f/2 DG DN Contemporary

Attribute	Sigma 65mm f/2 DG DN Contemporary ×	Carl Zeiss 50mm f/1.4 Planar T* 1.4/50 ×
Filter Size (mm)	62	58
Notes	Available AF Mounts: L-Mount, Sony E-Mount	Available SLR mounts: Canon EF-Mount (ZE), Nikon F-Mount (ZF, ZF.2), Pentax K-Mount (ZK), M42 Screw Mount (ZS). Nikon ZF.2 version includes CPU inter
Closest Focus (m)	0.55	0.45
Magnification Ratio (x)	0.15	0.15
Type	Tele Prime	Standard Prime
Focus Details	Smooth, quiet and high-speed AF via stepping motor	Manual focus only
APS Equivalent	1.5x: 97.5mm	1.5x: 77.6mm
Diameter (mm)	72	65
Image Circle	65mm	35mm
Focal Length (mm)	65.00	51.70
Brand	Sigma	Carl-zeiss
Name	Sigma 65mm f/2 DG DN Contemporary	Carl Zeiss 50mm f/1.4 Planar T* 1.4/50
Weight (g)	405	330
Aperture (f)	2.00 - 22.00	1.40 - 16.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	36.80	45.40
Length (mm)	74.7	45
Diaphragm Blades Type	rounded	-
Lens Construction	12 elements in 9 groups, with 1 SLD glass and 2 aspherical lenses	7 elements in 6 groups