Vand sau schimb obiectiv pentru Nikon, Sigma ART 18-35mm f1.8 constant HSM

Un obiectiv din gama pro. Unul dintre cele mai populare si cele mai bune obiective pentru montura Nikon DX. Cuprinde cea mai folosita plaja focala pentru evenimente. Montura Nikon DX - conceput pentru crop, putanf fi folosit si pe FullFrame catre capatul 35mm.

Stare buna (cauciucul de zoom usor largit, clasica problema, cauciucul de focus perfect ), optic perfect, fara front sau back focus, imagini foarte foarte sharp, pe toata plaja focala, direct de la f1.8!

HSM: Focus exceptional de rapid si silentios cu motor ultrasonic

Constructie solida din metal, plastic dur abs si sticla

Multi Coating
17 elemente in 12 grupuri
Elemente asferice - elementele asferice elimina practic aberatiile cromatice si alte tipuri de aberatii optice (astigmatism), nevoie crescuta mai ales la obiectivele foarte luminoase cu diafragma foarte deschisa

Diafragma rotunjita cu 9 lamele
Motor focus HSM(silent wave motor)
Focus intern, elementul frontal nu se roteste putand fi folosite orice fel de filtre

Foto reale. Ambele capace, parasolar.

Un review mai amanuntit aici:

www.kenrockwell.com/sigma/18-35mm-f18.htm

"This Sigma 18-35mm f/1.8 is an optically superb lens, but it's also much bigger and heavier than similar fixed lenses like the superb Nikon 35mm f/1.8 DX.

If you don't mind the weight and don't worry about the future, the Sigma 18-35mm works fantastically well today. This 18-35mm f/1.8 is ultrasharp at every setting, even wide-open.

Focus is silent, and you may grab the ring at any time for instant manual focus override. At least on the Nikon version I tried, Sigma finally has this figured out."