The box is a little tatty, with marks and has been opened and is unsealed. It checked and tested and is in new condition Note: Missing Protective Cover PT-31 otherwise complete. Actual unit may show some signs of use, minor marks or scratches. The Open Box Sigma 100-400mm f5-6.3 DG DN OS Contemporary Lens for Sony E-Mount offers a compact telephoto package with excellent image quality and versatile impressive reach. The optical construction has been optimised for the shorter flange distance found on mirrorless cameras and consists of 22 lens elements in 16 groups. A series of specialised lens elements including one Low Dispersion (FLD) and four Special Low Dispersion (SLD) elements suppress chromatic aberrations, colour fringing and ensure high clarity and colour accuracy across the whole zoom range. With a perfect range for moderate sports and action photography, the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary Lens fast, near-silent autofocus thanks to its stepping AF motor optimised for both phase-detect and contrast-based autofocus. The lens' optical stabilisation unit compensates for up to four stops to reduce effects of camera shake for sharper handheld photos. Additionally, the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary's intuitive controls include a customisable AFL button, an OS switch with a general photography mode and a mode for action, and a zoom-lock switch for transportation as well as a trombone-style zoom Sigma calls Dual Action Zoom. It is also fitted with a rugged brass lens-mount with rubber seal for dust and moisture resistance. Key Features of the Open Box Sigma 100-400mm f5-6.3 DG DN OS Contemporary Lens for Sony E-Mount Designed exclusively for full-frame mirrorless cameras. One F Low Dispersion (FLD) element and four Special Low Dispersion (SLD) elements reduce chromatic aberrations and colour fringing throughout the zoom range for improved clarity and colour accuracy. Stepping AF motor combined with an optimised AF algorithm for both phase-detection AF and contrast AF offers quick, smooth and quiet autofocus. Optical image stabilisation with up to four stops compensation for sharp handheld imagery. Minimum focusing distance of 112cm is available towards 100mm, and at the 400mm end, the lens can focus to 160cm with a maximum magnification of 1:4.1. Integrated AFL button can be programmed to adjust various shooting settings. Focus limiter switch for faster focusing performance within certain distance ranges. A zoom lock switch prevents the barrel from accidental extension when transporting the lens. Pleasing bokeh quality is assured by the use of a rounded 9-blade aperture diaphragm. The rugged brass lens-bayonet improves mounting accuracy and rigidity. Additionally, rubber sealing is incorporated in the mount's design to render the lens dust- and splash-resistant. Compatible with optional TS-111 Tripod Socket. Included PT-31 Protective Cover can be attached to the lens to maintain a seamless appearance if the optional tripod socket is not used. Optics Designed Exclusively for Full-frame Mirrorless Cameras Designed specifically for a camera with a short flange back distance, the DG DN series of lenses achieve a supreme combination of optical performance and compactness that could not have been possible with lenses for single-lens reflex cameras. 22 Individual Lens Elements in 16 Groups incl. 1x Low Dispersion (FLD) Elements 4x Special Low Dispersion (SLD) Elements The lens construction of the SIGMA 100-400mm F5-6.3 DG DN OS Cont...