Leica S 45mm f2.8 Asph
The Leica Elmarit-S 45mm f/2.8 ASPH./CS offers the same angle of view as a 35mm lens in 35mm format and thus adds a true classic focal length to the Leica S system portfolio. With its moderate wide-angle character and simultaneously natural rendition of perspectives, it is particularly suitable for universal use in fields ranging from photojournalism to architectural photography and studio applications. The highly sophisticated construction of this lens, which is also available in a version with a central shutter, guarantees extremely high performance at all distances and aperture settings.
Three of its twelve elements are manufactured from glasses with anomalous partial dispersion and two further elements from glasses with high refractive indices and especially low dispersion properties for the correction of chromatic aberrations. Monochromatic aberrations are prevented by an element with one aspherical surface. Rear-group focusing guarantees consistently outstanding imaging properties from infinity to its closest focusing distance.
The enormous effort invested in the design and construction of this lens guarantees its excellent optical performance: The contrast is exceptionally high even when shooting wide open and down to its closest focusing distance, and stopping down very slightly is sufficient to ensure this already superior performance into the extreme corners of the image. The distortion value of only 1% is remarkably low for a wide-angle lens and satisfies even the most stringent demands. In the case of the Leica Elmarit-S 45mm f/2.8 ASPH./CS, monochromatic aberration is practically non-existent and chromatic aberrations have been reduced to a minimum that is negligible in practical circumstances