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Sigma 18-200mm f/3.5-6.3 DC OS

Sigma 18-200mm f/3.5-6.3 DC OS Specifications
Frame Coverage APS-C
Lens Construction (groups) 13
Lens Construction (elements) 18
No. of Diaphragm Blades 7
Minimum Aperture 22
Closest Focusing Distance 0.45m (17.7")
Maximum Magnifcation 0.26x
Filter Diameter 72mm
Maximum Diameter x Length 79mm x 100mm (3.1" x 3.9")
Weight 610g (21.5oz)
Source
DPReview.com
The 18-200mm F3.5-6.3 DC OS HSM is on the face of it an ideal 'do-it-all' travel lens; the 11x zoom range, image stabilization and useful close focus distance combine to give great operational flexibility. But of course this versatility comes at a cost, as optical compromises must necessarily be made to provide such a long range in a single lens.
Photodo.com
Sigma must be congratulated for being the only independent to offer in-lens stabilisation and in this case, one that really works. It is not really required at the short end of the range but does become very handy as the focal length increases. With commendable optical performance for its type, the lens is well worth consideration.
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