Sigma 17-50mm F2.8 EX DC OS HSM vs. Sigma 17-70mm F2.8-4 DC Macro OS HSM vs. Nikon AF-S DX Nikkor 17-55mm f/2.8G ED-IF

Side by side
3 lenses compared
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Feb 20, 2010
Dec 4, 2009
Jul 22, 2003
 
Zoom lens
Zoom lens
Zoom lens
APS-C / DX
APS-C / DX
APS-C / DX
17–50 mm
17–70 mm
17–55 mm
Yes (4 stops claimed)
Yes (4 stops claimed)
No
Canon EF-S, Nikon F (DX), Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha DT
Canon EF-S, Nikon F (DX), Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha
Nikon F (DX)
 
F2.8
F2.8–4
F2.8
F22
F22–32
F22
No
No
No
7
7
9
Rounded diaphragm
rounded diaphragm
rounded blades
 
17
17
14
13
13
10
2 FLD glass elements 2 glass mold elements 1 hybrid aspherical lens
1 ELD glass element 1 hybrid aspherical element 2 glass mold elements
3x ED glass elements and 3x aspherical lens elements
 
0.28 m (11.02)
0.22 m (8.66)
0.36 m (14.17)
0.2×
0.37×
 
Yes
Yes
Yes
Ultrasonic
Ultrasonic
Ultrasonic
No
No
Yes
Internal
Internal
Internal
For Pentax mount, AF will not function with DSLR cameras that do not support HSM
AF will not function with Pentax ist* series and K100D DSLR cameras that do not support HSM
 
Yes
Yes
Yes
No
No
Yes
No
No
 
 
565 g (1.25 lb)
520 g (1.15 lb)
755 g (1.66 lb)
84 mm (3.29)
79 mm (3.11)
86 mm (3.37)
92 mm (3.62)
89 mm (3.5)
111 mm (4.35)
Metal mount
Metal mount
Magnesium alloy barrel, metal mount
No
No
Yes
 
 
Black
Rotary (extending)
Rotary (extending)
Rotary (internal)
77 mm
72 mm
77 mm
Does not rotate on focusing
Does not rotate on focusing
 
Yes
Yes
Yes
 
 
HB-31
No
No
No