Avaliações para Sigma APO 17-50mm F2.8 EX DC OS HSM
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Sigma 17-50mm f/2.8 EX DC OS HSM standard zoom lens Review
Trusted Reviews
24 Agosto 2016
Resumo: Whether you’re buying your first DSLR and want to upgrade the standard zoom kit lens to something a bit more special, or a DSLR owner looking to build a lens collection, the Sigma 17-50mm f/2.8 EX DC OS HSM is a good place to start .
Resumo: Lornetkę Alpen Optics Wings ED 10×42 zamówiłem do testów, bo bardzo byłem ciekawy jej wyniku. Dlaczego właśnie ją? Rzućmy okiem na następującą tabelę . Lornetki Olympus EXWP I i Vortex Viper to hity naszego dużego testu 10×42.
Prós: solidna, a jednocześnie lekka obudowa,, pole widzenia troszkę większe od bezpośrednich konkurentów,, dobrze korygowana aberracja chromatyczna,, niewielki astygmatyzm,, przyzwoicie korygowana koma,, niewielkie pociemnienie obrazu na brzegu pola,, dobre wyczernienie i czystość wewnątrz tubusów,, źr...
Cons: transmisja mogłaby być wyższa,, ostrość na brzegu pola widzenia powinna być lepsza.
Resumo: A compact standard zoom lens for APS-C digital SLRs from Sigma with a bright constant f/2.8 aperture, optical stabilisation and a silent focusing motor.
Prós: Excellent performance in the centre between 28 and 50mm when stopped down, Effective Optical Stabiliser, Compact and lightweight for an f/2.8 zoom
Cons: Lens really needs stopping down for best results, Sharpness towards the edges,, Focus ring cannot be disengaged
Resumo: Reading our test you can see very clearly that the Sigma entered the segment of more expensive fast zoom lenses, aimed at ambitious amateur photographers or even professionals working with smaller sensors, very aggressively indeed. The performance of the tested lens is sometimes really impressive.
Prós: high build quality and very solid barrel,, sensational sharpness of images in the frame centre even at the maximum relative aperture,, decent image quality at the edge of the frame,, chromatic aberration well-controlled at longer focal lengths,, negligible astigmatism,, silent, quick and accurate...
Cons: noticeable chromatic aberration at the shortest focal length,, a bit too high vignetting,, significant coma at 17 mm,, too simplified manual focus ring,, image quality at the maximum aperture, at the edge of the frame for shorter focal lengths could have been better.
Resumo: Gary Wolstenholme takes a look at Sigma's flagship standard zoom for APS-C digital SLR cameras. Sigma's 17-50mm f/2.8 EX DC OS HSM costs around £590 and is available for Sigma, Canon, Nikon, Sony and Pentax SLR cameras that have an APS-C or smaller sized sensor.
Prós: Excellent performance in the centre between 28 and 50mm when stopped down, Effective Optical Stabiliser, Compact and lightweight for an f/2.8 zoom
Cons: Lens really needs stopping down for best results, Sharpness towards the edges,, Focus ring cannot be disengaged