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Review Summary
2011-01-16T19:00:00
I wanted a 400mm lens and read that this lens was a lot better than the Nikon or Sigma 80-400mm VR/OS lenses.. I ordered it and right away I found the lens a little soft at 400mm .. Shooting at the wider side I found the lens sharp and crisp.. It still may be the best lens in it's class but I wish it was a little sharper full out. For the cost it's well worth getting ..
squirrel400
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21 Elements in 15 Groups
20.4°- 6.2°
F4.5 - F22
150cm / 59.1 in.
1:4.2
77mm
8" x 3.6" - 203.5mm x 92.5mm
61.7 oz. (1750g)



This telephoto zoom lens incorporates Sigma's original OS (Optical Stabilizer) function. It offers the use of shutter speeds approximately 4 stops slower. Three SLD (Special Low Dispersion) glass elements provide excellent correction for chromatic aberration. This lens is equipped with the rear focus system that minimizes fluctuation of aberration caused by focusing. It provides optimum image quality throughout the entire zoom range.
The super multi-layer coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. The minimum focusing distance of 150cm (59.1") throughout the entire zoomrange and has a maximum magnification of 1:4.2 make it useful for close-up photography.
This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focusing capability. The addition of the optical 1.4x EXDG APO or 2x Ex DG APO Tele Converters produce a 168-560mm F6.3-8 MF ultra-telephoto zoom lens or a 240-800mm F9-11 MF ultra-telephoto zoom lens respectively.
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