Comparison of Carl Zeiss 50mm f/2 Makro-Planar T* 2/50 and Sigma 50mm ƒ/1.4 EX DG HSM

Attribute	Carl Zeiss 50mm f/2 Makro-Planar T* 2/50 ×	Sigma 50mm ƒ/1.4 EX DG HSM ×
Filter Size (mm)	67	77
Notes	Available SLR mounts: Canon EF-Mount (ZE), Nikon F-Mount (ZF, ZF.2), Pentax K-Mount (ZK). Nikon ZF.2 version includes CPU interface for autoexposure	Supported AF Mounts: Canon, Four-Thirds, Nikon, Pentax, Sigma, Sony. * If the camera body does not support HSM, autofocus will not be available.
Closest Focus (m)	0.24	0.45
Magnification Ratio (x)	0.5	0.14
Type	Standard Prime, Macro	Standard Prime
Focus Details	Manual focus only	HSM, with full-time manual focus override
APS Equivalent	1.5x: 77.4mm	1.5x: 75mm; 1.6x: 80mm
Diameter (mm)	72	68.2
Image Circle	35mm	35mm
Focal Length (mm)	51.60	50.00
Brand	Carl-zeiss	Sigma
Name	Carl Zeiss 50mm f/2 Makro-Planar T* 2/50	Sigma 50mm ƒ/1.4 EX DG HSM
Weight (g)	530	505
Aperture (f)	2.00 - 22.00	1.40 - 16.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	45.50	47.00
Length (mm)	65	84.5
Diaphragm Blades Type	-	rounded
Lens Construction	8 elements in 6 groups	8 elements in six groups, 1 aspherical lens element