Reviews and Problems with Sigma 18-200mm F3.5-6.3 DC OS HSM
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Value for money 8
Picture quality 7
Build quality 8
3 March 2011
Conclusion: 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.
Cons: Very inconsistent sharpness through the zoom range - extremely soft at 80mm, Soft corners at all focal lengths, Occasionally indecisive autofocus, Slightly less resistant to flare than its more recent competitors
Summary: Unsurprisingly a lens with this kind of focal range is rarely going to perform
as well as one with a shorter range, but we were impressed overall by the results
possible. Certainly unless you're into extreme wide or telephoto work, or demand
the ultimate quality, you could really be very happy with...
Pros: Highly versatile 11.1x zoom range, Great value, Relatively small and light - great travel lens, Polariser-friendly internal focusing
Cons: Tamron version very similar, Pricier Nikkor version has anti-shake, Pricier Nikkor version is optically faster, Pricier Nikkor version has better build quality