Sony 20mm F2.8 vs Sigma EX 50mm F1.4 DG HSM

This is a full comparison between the lenses Sony 20mm F2.8 and Sigma EX 50mm F1.4 DG HSM.

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Product	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Name	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Manufacturer	Sony	Sigma
SKU	SAL20F28
Release Date and Price	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Release Year	2006	2008
Release Date	2006-06-15
MSRP	N/A	730 USD
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Lens Type	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Lens Type	Wide Angle Lens	Standard / Normal
Zoom or Prime	Prime lens (no zoom)	Prime lens (no zoom)
Mount and Compatibility	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Mount	Sony A	Canon EFNikon F
Designed for APS-C sensor	No (Suitable for all sensors)	No (Suitable for all sensors)
Focus	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Autofocus (AF)	Yes	Yes
Built-in Autofocus (AF) Motor	Yes	Yes
Motor Type	Screw drive from camera	No information
Focus Method	No information	No information
Closest Focusing Distance	25 cm	45 cm
Maximum Magnification	0,13
Aperture	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Maximum Aperture	F2,8	F1,4
Diaphragm Blades	7	No information
Optics	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Construction	10 elements  /  9 groups	8 elements  /  6 groups
Special Elements/Coatings	No information	No information
Focal Length	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Focal Length	20 mm	50 mm
Zoom Range	None (Prime lens) No Zoom available.	None (Prime lens) No Zoom available.
Built-in Teleconverter	No	No
Teleconverter Multiplier	N/A	N/A
Image Stabilization	No	No
Image Stabilization CIPA Rating	N/A	N/A
Physical	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Weather Sealing	No	No
Diameter	78 mm	84 mm
Length	54 mm	68 mm
Weight	285 gr	505 gr
Other	Sony 20mm F2.8	Sigma EX 50mm F1.4 DG HSM
Filter Type	Filter Thread	Filter Thread
Filter Diameter	72 mm	77 mm
Lens Hood	Included	Included
Lens Hood SKU	SH0013	LH829-01 310
Tripod Collar	N/A	N/A
Tripod Collar SKU	N/A	N/A