Lenses comparison


Manufacturer	Pentax	Sigma	Sony	Nikon Nikkor
Model	smc DA 17-70 mm f/4.0 AL [IF] SDM	17-70 mm f/2.8-4.5 DC Macro	Carl Zeiss Vario-Sonnar T* DT 16-80 mm f/3.5-4.5	AF-S DX 18-70 mm f/3.5-4.5 IF-ED
Lenst style	Universal zoom	Universal zoom	Universal zoom	Universal zoom
Focal length	17 - 70 mm	17 - 70 mm	16 - 80 mm	18 - 70 mm
Maximum aperture	f/4	f/2.8 - 4.5	f/3.5 - 4.5	f/3.5 - 4.5
Angle of view	79 - 23 ^o	72.4 - 20.2 ^o	83 - 20 ^o	76 - 22.5 ^o
Closest focusing distance	0.28 m	0.2 m	0.35 m	0.38 m
Maximum magnification	1:3.2	1:2.3	1:4.16	1:6.2
Minimum aperture	22	22	29	29
Diaphragm blades	7	7	7	7
Auto focus type	SDM	AF	AF	AF
Lens Construction	17 elements / 12 group	15 elements / 12 group	14 elements / 10 group	15 elements / 13 group
Filter diameter	67 mm	72 mm	62 mm	67 mm
Macro Yes/No	No	Yes	No	No
Stabilization	No	No	No	No
Available mounts	Pentax K	Nikon F Sony A / Minolta Sigma Pentax K Canon EF-S	Sony A / Minolta	Nikon F
Dimensions	75 x 93.5 mm	79 x 82.5 mm	72 x 83 mm	73 x 75.5 mm
Weight	485 g	455 g	445 g	390 g
Additional information	Marketed 03.06.2008		2 aspherical lenses. Anounced: June 2006.	Marketed 2004
Score [max 5.00]	3.67 (7)	4.05 (14)	4.17 (6)	3.88 (8)
Our Review	Review		Review	Review