The Sigma 135mm F1.8 DG HSM Art is a premium telephoto prime lens engineered for professional portraiture and event photography on full-frame Nikon DSLRs. Featuring a remarkably bright f1.8 maximum aperture at 135mm focal length, this Art series lens delivers exceptional subject separation and smooth, creamy bokeh courtesy of its 9-blade rounded diaphragm. The Hyper Sonic Motor (HSM) provides rapid, whisper-quiet autofocus with full-time manual focus override, whilst internal focusing keeps the barrel fixed during operation. Weather sealing around the mount offers real-world durability in challenging conditions. Handcrafted in Sigma's Aizu factory and featuring premium optical elements including FLD and SLD glass with Super Multi-Layer Coating, this lens combines outstanding sharpness, contrast and colour fidelity with minimal aberrations. The 82mm filter thread and 1.13kg weight reflect the optical sophistication of this telephoto prime.