Lenses comparison


Manufacturer	Nikon Nikkor	Canon	Pentax	Sigma
Model	AF-S DX 17-55 mm f/2.8G IF-ED	EF-S 17-55 mm f/2.8 IS USM	smc DA* 16-50 mm f/2.8 AL ED IF SDM	18-50 mm f/2.8 EX DC Macro
Lenst style	Universal zoom	Universal zoom	Universal zoom	Universal zoom
Focal length	17 - 55 mm	17 - 55 mm	16 - 50 mm	18 - 50 mm
Maximum aperture	f/2.8	f/2.8	f/2.8	f/2.8
Angle of view	79 - 28.5 ^o	77.3 - 27.8 ^o	83 - 31.5 ^o	69.3 - 27.9 ^o
Closest focusing distance	0.36 m	0.35 m	0.3 m	0.2 m
Maximum magnification	1:5	1:5.88	0.21	3
Minimum aperture	22	22	22	22
Diaphragm blades	9	7	9	7
Auto focus type	AF	USM	SDM	AF
Lens Construction	14 elements / 10 group	19 elements / 12 group	15 elements / 12 group	15 elements / 13 group
Filter diameter	77 mm	77 mm	77 mm	72 mm
Macro Yes/No	No	No	No	Yes
Stabilization	No	Yes	No	No
Available mounts	Nikon F	Canon EF-S	Pentax K	Nikon F Sigma Pentax K Four Thirds Canon EF-S
Dimensions	85.5 x 110.5 mm	83.5 x 110.6 mm	84 x 98.5 mm	85.8 x 79 mm
Weight	755 g	645 g	565 g	450 g
Additional information	Marketed 2004	Marketed March 2006		Special Low Dispersion (SLD) Lenses and Extraordinary Low Dispersion (ELD) Lenses inside Marketed September 2006
Score [max 5.00]	4.41 (13)	3.93 (14)	4.13 (5)	4.00 (7)
Our Review	Review	Review