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 Lens
The Digital Picture
24 October 2014
Excerpt: I do not currently plan to create a full text review for the Sigma 120-400mm f/4.5-5.6 DG OS HSM Lens, but the full array of standardized tests are available for your own evaluation and comparison with similar lenses.
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. Thankfully, due to the effectiveness of the OS technology, this is a lens you can confidently use handheld at two or three stops slower than would otherwise be possible.
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. For it's price, it has excellent build quality and a good range of useful features, such as Optical Stabilisation and silent focusing, but some aspects of handling could still be improved, like the looseness of the zoom mechanism.
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. That said the border/corner performance is, of course, not overly relevant for such a lens so you may forgive this weakness.
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 beginning amateurs as a supplement of the kit lens, are an appliance whose focal length ends at 400 mm, are a totally different caliber.
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.
Summary: A competitively-priced, optically-stabilised long-zoom lens for DSLR cameras with 'full-frame' or 'APS-C' sized image sensors.A close cousin to the APO 150-500mm F5-6.3 DG OS HSM lens, which has also been reviewed on the Photo Review website, Sigma's APO 120-400mm F4.5-5.6 DG OS HSM lens can be used on both 'full frame' and 'APS-C-sized' DLSR cameras as well as traditional 35mm SLRs.
Excerpt: Mye for pengene
Mye for pengene. Like stor som Nikons 70-200 2.8 VR. Kan diskutere om den gjør mye av samme nytten med en 2x-konverter. Denne vil ha noe bedre blenderåpning på den korte enden. Enkel vei inn i fuglefotoverden. Skal testes på safari i Afrika neste uke. Der kommer den nok til sin rett.
Pros: Fabelaktig OS-funksjon. OK bildekvalitet i forhold til pengene. Lite jaging på fokus. Relativt kompakt.
Cons: Bruker en del batteri ved bruk av OS. Ikke like krystallklar som proffobjektivene. Knappene for å låse zoomen samt å endre OS-innstilling er veldig lett å bevege så jeg har ved flere anledninger switchet disse uten intensjon.