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|Dimensions (dxl)||Approx. 3.01 x 4.98" (7.65 x 12.65 cm)|
|Weight||1.34 lb (610 g)|
|Filter thread||62 mm|
|Angle of view||34.3° - 8.2°|
|Maximum reproduction ratio||1:3.9|
|Minimum focus distance||4.92' (1.5 m)|
|Focal length||70 - 300 mm|
|Camera mount type||Nikon F|
|Aperture||Maximum: f/4.0 - 5.6
|Format compatibility||Nikon FX/35mm Film
Overall, there are 16 elements built into 11 groups and a 9-blade diaphragm which enables an aperture range of f/4-5.6 to f/22-32. Another crucial difference is that this lens lacks the APO version's macro facility, the maximum magnification factor being 0.25x instead of 0.5x.
Sharpness is good at 300mm, even when using the largest aperture of f/5.6, Effective 4-stop optical stabiliser, Robust build quality
Autofocus motor is quite noisy in operation, Front element extends and rotates during focusing, Lacks the 0.5x macro facility of Sigma's older 70-300mm APO lens
Overall, Sigma’s lens performed very well and field testing suggests it loses nothing by offering only single-mode image stabilisation. At some £300 on-the-street, this looks rather a bargain.
ePHOTOzine resident lens tester, Gary Wolstenholme casts his discerning eye over the Sigma 70-300mm. It has long been a popular choice amongst budget-conscious photographers looking to cover this popular range.
Good resolution at shorter focal lengths, Optical Stabiliser, Low Distortion at 70mm
Rotating AF ring, Drop off in resolution and contrast at 300mm, Slow focusing speed
I really like this lens. It's light and easy to use, and I can carry it while hiking. The images I get are razor sharp-PROVIDED THAT I take great care in focusing. The major drawback is that lens is a little slow to focus, sometimes has to "hunt," and sometimes is off-focus, so I have to check it.