Comparison of Zeiss 100mm f/1.4 Otus 1.4/100 and Sigma 50-100mm f/1.8 DC HSM Art

Attribute	Zeiss 100mm f/1.4 Otus 1.4/100 ×	Sigma 50-100mm f/1.8 DC HSM Art ×
Aperture (f)	1.40 - 16.00	1.80 - 16.00
Filter Size (mm)	86	82
Notes	Available Mounts: Canon EF (ZE), Nikon F (ZF.2); Included Accessories: Lens hood, front and rear lens caps.	Available AF Mounts: Canon EF-S, Nikon F, Sigma SA; Included Accessories: Lens hood, lens caps, tripod collar. Compatible with Sigma USB Dock.
Closest Focus (m)	1	0.95
Magnification Ratio (x)	0.12	0.15
Diameter (mm)	101	94
Type	Telephoto Prime	Telephoto Zoom
APS Equivalent	1.5x: 150mm; 1.6x: 160mm	1.5x: 75 - 150mm; 1.6x: 80 - 160mm
Diaphragm Blades	9	9
Image Circle	35mm	APS-C
Focal Length (mm)	100.00	50.00 - 100.00
Brand	Carl-zeiss	Sigma
Name	Zeiss 100mm f/1.4 Otus 1.4/100	Sigma 50-100mm f/1.8 DC HSM Art
Weight (g)	1405	1491
Diaphragm Blades Type	rounded	rounded
Lens Construction	14 elements in 11 groups, including aspherical elements and 9 elements made of special glass with anomalous partial dispersion	21 elements in 15 groups, including 3 FLD (F Low Dispersion) glass elements, 1 SLD (Special Low Dispersion) glass element, and 1 high-refractive inde
Diagonal Angle of View (degree)	24.00	16.20 - 31.70
Length (mm)	129	170.2
Zoom System	-	Rotary
Focus Details	Internal focusing; Manual focus only	HSM (Hyper Sonic Motor) with full-time manual focus override