LEICA VARIO-ELMARIT SL 90-280MM F2.8-4

Fast autofocus

Product Description
The zoom range of the fast Leica APO-Vario-Elmarit-SL 90–280 mm f/2.8–4 follows on directly from that of the Leica Vario-Elmarit-SL 24–90 mm f/2.8–4 ASPH. Together, these two lenses cover a full range of focal lengths extending from 24 to 280 mm. The newly developed dual internal focusing concept enables the fastest autofocus found in any professional camera system. Its optical image stabilisation (OIS) compensates for up to 3.5 stops of camera shake.

From zero to sharp in no time
The AF system of these lenses is fast, precise, and almost silent. They thank their outstanding AF performance figures to the autofocus drive unit they share. These are limited only by the mass of the lens elements moved when focusing, the travel from infinity to the closest focusing distance and, of course, the amount of space available. In order to preserve the compact dimensions of the lenses, the integration of these components must follow an integral approach.

Construction Details
Of the 23 elements in seven moving groups, seven are made from glasses with anomalous partial dispersion for the minimisation of chromatic aberrations. The movement of the two focusing elements is provided by a newly developed drive concept with linear positioning of the lenses by stepping motors. A special feature of this is that the overall length of the lens does not change when either focusing or zooming.