Dans le droit fil des trois messages précédents : LensTip.com a publié la version anglaise de l'essai du Sigma 28 mm f/1,4 DG HSM | Art sur Canon EOS 5D Mark III et EOS 50D réalisé par Arkadiusz Olech et Maciej Latałło.Sigma A 28 mm f/1.4 DG HSM review - LensTip.com
Points forts :
- fût solide et élégant
- qualité d'image sensationnelle au centre
- très bonne qualité d'image sur les bords du format APS-C
- bonne qualité d'image sur les bords du format 24x36
- pas de problème d'aberration chromatique longitudinale
- aberration chromatique latérale légère
- distorsion imperceptible, la plus faible dans cette classe d'équipements
- correction raisonnable de la coma
- très faible astigmatisme
- vignetage léger sur capteur APS-C
- bokeh agréable
- autofocus silencieux.
Points faibles :
- très fort vignetage à pleine ouverture en 24x36
- les performances en contre-jour laissent un peu à désirer.
The launch of the Sigma A 28 mm f/1.4 DG HSM was an interesting even, concerning a very demanding segment with fierce competition. First of all, the Sigma has serious rivals among its own Art line, like very well made A 1.4/24 and 1.4/35 models. The new Sigma lens is better than them but also more expensive and bigger – after all, you get nothing for nothing… Still if somebody couldn’t make up their mind, what to buy, the 24 mm or the 35 mm, now might choose the 28 mm instrument and enjoy the best image quality of all three.
When it comes to rivals produced by other companies the new Sigma doesn’t have it easy either. In this segment the Otus 1.4/28 manufactured by the Zeiss is a kind of show of force. Apart from that, the Nikkor AF-S 28 mm f/1.4G ED happens to be one of the most successful launches of the Nikon in recent years. As a result this trio of lenses performed neck and neck in particular categories, often winning by a hair’s breadth. The competition was won slightly by the Otus but you have to remember its physical dimensions and the price, currently amounting to almost $5000. The well-done Nikkor is not cheap either; if you want to buy it you have to spend nearly $2000. Compared to that the Sigma, with a price tag of less than $1400, seems to be a real bargain; mind you, it occupies a very favourable second place, even though we admit its advantage over the more expensive Nikkor was really slight.
Finally one more remark. The tested model was launched along with the Sigma A 40 mm f/1.4 DG HSM, a lens optically outstanding but really big and heavy. I’ve been wondering why Sigma didn’t reduce physical dimensions of the 40 mm device and they clearly did the opposite in the case of the noticeably smaller 28 mm lens. A 1.4/28 instrument is much more difficult to design than a 1.4/40; it would be only natural to expect that the former would be bigger and heavier than the latter, in order to avoid too many compromises. Sigma decided to optimize weight and dimensions of the 28 mm lens to a certain point and produced an optically weaker instrument than the outstanding 40 mm.