Reviews and Problems with Sigma APO 70-200mm F2.8 EX DG OS HSM
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Sigma 70-200mm f/2.8EX DG OS HSM review
5 June 2011
Conclusion: A real alternative to marque models. Its OS works well and AF is excellent. The optical performance is excellent and if you're a Canon user, this is a better-specified alternative to the similarly-priced non-IS Canon zoom.
Summary: Sigma's latest image-stabilized fast telezoom offers a fine option for budget-conscious buyers, with a unique combination of features for the price. It can't quite match its Canon and Nikon equivalents, but then again it's not as expensive either.
Pros: Very sharp across the frame when stopped down, Minimal color fringing/chromatic aberration of any description, Fast, silent, accurate autofocus with manual override, Very effective image stabilization, Decent build quality, Clever design tripod mount which is quick and easy to remove with the lens on the camera
Cons: Somewhat soft and low in contrast at F2.8 towards the edges, especially on full frame cameras, Can give somewhat harsh rendition of out-of-focus backgrounds at longer focus distances, No focus limiter switch, No weathersealing, Susceptible to flare with direct light sources in or close to the frame, Front-positioned zoom ring is inoperable when hood is reversed, Depth of field scale inaccurate at close focus distances
Excerpt: A lens with a 70-200mm focal length range, a wide, fixed max f/2.8 aperture and optical stabilization is destined to become a critical part of most people's lens kit. With this lens model now offered by many manufacturers, "Which one is right for you?" is a bigger question than "Can I make use of this lens?" And that is the bigger question this review will attempt to help you answer, but I'll answer the easier/latter question first.
Summary: A fast, stabilised, medium-telephoto lens that can be used with 'full frame' and APS-C sensor DSLR cameras and supports hand-held shooting in low light situations.Sigma has been producing fast tele zoom lenses for hand-held photography since the late 1980s and, although the new 70-200mm f/2.8 APO EX DG OS lens claims to be a second generation model, we estimate it's the sixth in a line that reaches back to the original AF 70-210mm f/2.8, which was designed for 35mm film...
Pros: You want a fast zoom lens for subjects that require longer focal lengths., You require high resolution for much of the aperture range at all focal lengths., You want fast and quiet autofocusing., You take a lot of backlit shots. Don't buy this lens if :, You can't handle the almost 1.5 kg weight.
Summary: During testing this Sigma lens has proved itself quite capable of producing excellent results. For the most part, the sharpness in the centre is very good, or even excellent. Unfortunately its Achilles heel is the performance wide open at 70mm, where it is a bit lacklustre for a lens costing £1200.
Pros: Excellent centre sharpness at most focal lengths and apertures, Very low CA levels, Fast AF, Optical Stabiliser, Decent build quality
Cons: Lacklustre resolution performance at 70mm and f/2.8
Excerpt: Originally posted 2010-09-06 on Optyczne.pl A 70-200 mm lens with f/2.8 aperture is a standard journalistic device. Small wonder every prestigious optics producer wants to have such a lens in its line-up. What’s more, journalists are very demanding customers so the manufacturers strive to put inside such an instrument the best of everything they have.
Cons: a bit too soft wide open at the edge of full frame,, significant vignetting on full frame,, cooperation with converter might have been better in some areas.
Excerpt: Sigma's 70-200mm f/2.8 EX DG MACRO HSM is solidly built and well designed, although the zoom ring could do with being about an inch further forward to make it truly comfortable to use. The overall size and weight of the lens mean that you need to use the tripod collar for optimum balance - rather than mount your camera onto your tripod with the lens making it front-heavy, though the collar can be removed if you prefer.