Reviews and Problems with Sigma APO 120-400mm F4.5-5.6 DG OS HSM
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Sigma 120-400mm f/4.5-5.6 DG OS HSM Review
30 September 2014
Conclusion: While no lens of this power is going to be compact, the Sigma is as light and short as you could reasonably expect. Like any long, weighty telephoto, ideally you would always combine this lens with the stability of a support. This isn’t always practical, though, particularly when shooting wildlife.
Summary: Being priced at £675, this lens represents a good value choice for those looking for a super-telephoto lens, without the extortionate price tag associated with some camera manufacturer's own lenses in this range.
Pros: Priced well, Good build quality, Optical Stabilisation, Silent focusing with full-time manual override
Cons: Prone to flare when used without the supplied lens hood, Loose zoom mechanism suffers with zoom creep, Hunts for focus in low light conditions
Sigma AF 120-400mm f/4.5-5.6 DG HSM OS - Full Format Review / Lab Test Report
22 June 2010
Conclusion: The Sigma AF 120-400mm f/4.5-5.6 DG HSM OS is a consumer grade tele zoom lens with a relatively decent albeit not spectacular performance. The resolution figures are generally fine in the image center whereas the borders/corners are just soso in the lower part of the zoom range.
Excerpt: Originally posted 2008-06-16 on Optyczne.pl Lenses whose focal lengths start at around 100 mm and end at 400 mm are interesting proposals for many advanced photographers. While instruments of 70-300 class, by virtue of their affordable price and still acceptable dimensions, are often chosen by...
Cons: too weak image quality at 400 mm,, large weight and dimensions compared to the competition,, bad work against bright light,, mediocre accuracy of the focusing mechanism.