The Leica APO-Vario-Elmarit-SL 90-280mm f/2.8-4 is designed for full-frame and APS-C-sized L-mount mirrorless cameras. An intricate 23 elements, 17 groups optical design incorporates seven anomalous partial dispersion elements to significantly reduce chromatic aberrations throughout the zoom range and provide faithful colour accuracy that is void of fringing. The f/2.8-4 maximum aperture benefits working in a variety of lighting conditions and also offers greater control over focus position for working with shallow depth of field techniques. Designed as an apt-performing tele zoom covering a broad array of focal lengths, this well-corrected optic maintains consistently high clarity and sharpness throughout the long-reaching zoom range.