Comparison of Carl Zeiss 25mm f/2 Distagon T* 2/25 and Sigma 24mm f/1.4 DG HSM Art

Attribute	Sigma 24mm f/1.4 DG HSM Art ×	Carl Zeiss 25mm f/2 Distagon T* 2/25 ×
Filter Size (mm)	77	67
Notes	Available AF Mounts: Canon EF, L-Mount, Nikon F, Sigma SA and Sony E; Compatible with Sigma's USB Dock and Mount Conversion Service	Available SLR mounts: Canon EF (ZE), Nikon F-Mount (ZF.2)
Closest Focus (m)	0.25	0.25
Magnification Ratio (x)	0.19	0.17
Type	Wide Prime	Wide Prime
Length (mm)	90.2	98
APS Equivalent	1.5x: 36mm; 1.6x: 38.4mm	1.5x: 37.5mm
Diagonal Angle of View (degree)	84.10	81.00
Image Circle	35mm	35mm
Focal Length (mm)	24.00	25.00
Brand	Sigma	Carl-zeiss
Name	Sigma 24mm f/1.4 DG HSM Art	Carl Zeiss 25mm f/2 Distagon T* 2/25
Weight (g)	665	600
Aperture (f)	1.40 - 16.00	2.00 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	circular
Lens Construction	15 elements in 11 groups, including 3 FLD, 4 SLD and 2 aspherical elements	11 elements in 10 groups
Diameter (mm)	85	73
Focus Details	HSM (Hypersonic Motor) with full-time manual focus override	Manual focus only