Leica APO-Vario-Elmarit-SL 90-280/2.8-4

ÿþThe 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.

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. The lens hood supplied with the lens suppresses undesirable reflections and stray light. The lens also has a removable tripod plate for attaching it to a tripod. Its ergonomic design makes the lens easier to carry by hand and allows the attachment of a lens belt. A lockable rotating tripod collar allows the lens to be fixed at any angle. The collar has detents every 90 degrees for rapid switching from landscape to portrait format.

Lens Leica APO-Vario-Elmarit-SL 90 280 mm f/2.8 4
Order no. 11 175
Angle of view
(diagonal, horizontal, vertical)
Focal length 90 mm: 26.4°/22.1°/14.8°; Focal length 280 mm: 9.1°/7.5°/5.0°
Optical design Number of elements/groups: 23/17
Position of entrance pupil: Focal length 90 mm: 130.2 mm; Focal length 280 mm: -21.1 mm
Working range: Focal length 90 mm: 0.6 m to infinity; Focal length 280 mm: 1.4 m to infinity
Focussing Smallest object field: Focal length 90 mm: 114 x 171 mm; Focal length 280 mm: 120 x 180mm
Largest reproduction ratio: Focal length 90 mm: 1:4.8; Focal length 280 mm: 1:5.0
Aperture Setting/function: Electronically controlled iris, setting with the camera clickwheel control,
third-stop and half-stop settings
Aperture setting range: Focal length 90 mm: 2.8-22; Focal length 280 mm: 4-22
Smallest value: 22
O.I.S. Performance as per CIPA: 3.5 stops
Bayonet/sensor format Leica L bayonet, full-frame 35 mm format
Filter thread E82
Dimensions and weight Length to bayonet flange: 238 mm (without lens hood)
Largest diameter: 88