Comparison of Zeiss 55mm ƒ/1.4 Otus 1.4/55 APO Distagon and Panasonic 50mm f/1.4 Lumix S Pro (S-X50)

Attribute	Zeiss 55mm ƒ/1.4 Otus 1.4/55 APO Distagon ×	Panasonic 50mm f/1.4 Lumix S Pro (S-X50) ×
Filter Size (mm)	77	77
Notes	Available Mounts: Canon EF (ZE), Nikon F (ZF.2). Included Accessories: lens hood, front and rear lens caps.	Dust/splash-resistant; Included Accessories: front and rear lens caps, lens hood, storage bag.
Closest Focus (m)	0.5	0.44
Magnification Ratio (x)	0.15	0.15
Type	Standard Prime	Standard Prime
Length (mm)	144	130
APS Equivalent	1.5x: 82.5mm1.6x: 88mm	75mm
Diagonal Angle of View (degree)	43.70	47.00
Image Circle	35mm	35mm (L-Mount)
Focal Length (mm)	55.00	50.00
Brand	Carl-zeiss	Panasonic
Name	Zeiss 55mm ƒ/1.4 Otus 1.4/55 APO Distagon	Panasonic 50mm f/1.4 Lumix S Pro (S-X50)
Weight (g)	1030	955
Aperture (f)	1.40 - 16.00	1.40 - 16.00
Diaphragm Blades	9	11
Diaphragm Blades Type	rounded	circular
Lens Construction	12 elements in 10 groups, including 1 aspheric and 6 elements made of special glass with anomalous partial dispersion	13 elements in 11 groups, including 2 aspherical and 3 ED elements; Fluorine coating on front element.
Diameter (mm)	92.5	90
Focus Details	Internal focusing; Manual focus only	Internal AF; Double focus system combining linear and stepping motor; AF/MF clutch mechanism