Comparison of Sony 50mm f/1.4 ZA SSM Carl Zeiss Planar T* and Tamron 45mm ƒ/1.8 Di VC USD SP (Model F013)

Attribute	Sony 50mm f/1.4 ZA SSM Carl Zeiss Planar T* ×	Tamron 45mm ƒ/1.8 Di VC USD SP (Model F013) ×
Filter Size (mm)	72	67
Notes	For Sony A-mount. Included Accessories: Front and rear lens caps, ALC-SH126 lens hood.	Available mounts: Canon EF, Nikon F, Sony A; VC Optical Image Stabilization (Canon and Nikon only); Included Accessories: Lens hood, lens caps.
Closest Focus (m)	0.45	0.29
Magnification Ratio (x)	0.14	0.29
Type	Standard Prime	Standard Prime
Length (mm)	71.5	91.7
APS Equivalent	75mm	1.5x: 67.5mm; 1.6x: 72mm
Diagonal Angle of View (degree)	47.00	51.30
Image Circle	35mm	Image Circle
Focal Length (mm)	50.00	45.00
Brand	Sony	Tamron
Name	Sony 50mm f/1.4 ZA SSM Carl Zeiss Planar T*	Tamron 45mm ƒ/1.8 Di VC USD SP (Model F013)
Weight (g)	518	540
Aperture (f)	1.40 - 22.00	1.80 - 16.00
Diaphragm Blades	9	9
Diaphragm Blades Type	circular	circular
Lens Construction	8 elements in 5 groups, with 2 aspherical elements	10 elements in 8 groups, including 1 LD (Low Dispersion) and 2 aspherical elements
Diameter (mm)	81	80.4
Focus Details	Rear-focus, with SSM (Super Sonic wave Motor); Direct Manual Focus; Focus Hold Button	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism