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Sigma 120-300mm f/2.8 EX HSM

Sigma 120-300mm f/2.8 EX HSM Specifications
Frame Coverage 35mm
Lens Construction (groups) 16
Lens Construction (elements) 18
No. of Diaphragm Blades 9
Minimum Aperture 32
Closest Focusing Distance 1.8m (70.9")
Maximum Magnifcation 0.12x
Filter Diameter 105mm
Maximum Diameter x Length 112.8mm x 271mm (4.4" x 10.7")
Weight 2600g (91.7oz)
In our tests we found the contrast throughout the zoom range is consistently good and it’s virtually as sharp wide open as it is stopped down two or three apertures. There’s no visible degrading at the edges, even on 35mm.
The Sigma is close to the Canon 70-200 L IS in sharpness at overlapping focal lengths, but is not as sharp at 300mm as the very impressive Canon 300mm f/2.8 L IS. Of course, you need both Canons to cover the same focal length range as the Sigma.
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