Lenses comparison


Manufacturer	Sigma	Sigma	Nikon Nikkor	Leica	Voigtlander
Model	A 20 mm f/1.4 DG HSM	20 mm f/1.8 EX DG Aspherical RF	AF-S 20 mm f/1.8G ED	Summilux-M 21 mm f/1.4 ASPH.	Ultron 21 mm f/1.8
Lenst style	Wide angle	Wide angle	Wide angle	Wide angle	Wide angle
Focal length	20 mm	20 mm	20 mm	21 mm	21 mm
Maximum aperture	f/1.4	f/1.8	f/1.8	f/1.4	f/1.8
Angle of view	94.5 ^o	94.5 ^o	94.5 ^o	92 ^o	91.7 ^o
Closest focusing distance	0.27 m	0.2 m	0.2 m	0.7 m	0.5 m
Maximum magnification	1:7.1	1:4	1:4.35	1:29	1:7.7
Minimum aperture	16	22	16	16	22
Diaphragm blades	9	9	7	0	10
Auto focus type	HSM	AF	AF SWM	manual	MF
Lens Construction	15 elements / 11 group	13 elements / 11 group	13 elements / 11 group	10 elements / 8 group	13 elements / 11 group
Filter diameter	0 mm	82 mm	77 mm	82 mm	58 mm
Macro Yes/No	No	No	No	No	No
Stabilization	No	No	No	No	No
Available mounts	Canon EF Nikon F Sigma Sony E Sony FE L-mount/Leica-SL	Canon EF Nikon F Sony A / Minolta Sigma Pentax K	Nikon F	Leica M / VM-Mount	Leica M / VM-Mount
Dimensions	129.75 x 90.7 mm	88.5 x 87 mm	81 x 83 mm	70 x 77 mm	78.4 x 69 mm
Weight	950 g	520 g	355 g	580 g	412 g
Additional information	Announced: 16.10.2015 Data for Sigma mount		Anounced: Sep 12, 2014 2 ED and 2 aspherical lenses.		Announced: September 2012
Score [max 5.00]	4.00 (2)	3.82 (11)	4.33 (6)	No score	No score
Our Review	Review		Review