Vand sau schimb obiectiv pentru Nikon, SIGMA 17-50mm f2.8 EX DC HSM OS - cu stabilizare de imagine.

Un obiectiv din gama pro. Unul dintre cele mai bune obiective pentru montura Nikon DX. Cea mai folosita focala pentru evenimente.

Este un obiectiv conceput ca si corespondent al celebrului 24-70 f 2.8 pentru FullFrame. Totul lucreaza perfect, iar imaginea este foarte clara si foarte sharp, direct de la f2.8, la toate focalele.

HSM: Focus exceptional de rapid si silentios cu motor ultrasonic
EX - Gama "Excelence" de la Sigma

Constructie solida din metal plastic dur abs si sticla

- Nano Crystal Coating
- 17 elemente in 13 grupuri
- 3 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
- 2 elemente din sticla FLD - Extra Low Dispersion/ Super low dispersion (sharpness sporit, reducerea aberatiilor cromatice si color fringing)
- Diafragma rotunjita cu 7 lamele
- Motor focus HSM(silent wave motor)
- OS - Stabilizare de imagine
- Focus intern, elementul frontal nu se roteste putand fi folosite orice fel de filtre
- Filtru frontal pe 77 mm

Foto reale

Un review video mai amanuntit aici:

www.youtube.com/watch?v=t_rPxWpArNY

Specificatiile Sigma:

www.sigma-global.com/en/lenses/17_50_28/

"Large aperture standard zoom lens with a minimum focal length of 17mm, designed exclusively for digital SLR cameras and incorporating Sigma’s original OS (Optical Stabilizer). The OS function offers superior Stabilization. The lens has a compact construction with an overall length of 91.8mm. This compact and lightweight construction makes the lens ideal for travel photography. Two FLD (“F” Low Dispersion) glass elements, two glass mold and one hybrid aspherical lens provide excellent correction for all types of aberrations. This lens has superior peripheral brightness and provides sharp and high contrast images even at the maximum apertures. The incorporation of HSM (Hyper Sonic Motor) provides fast and quiet AF."