Sigma's massive Art-line 105mm f/1.4 — nicknamed 'Bokeh Master', the world's first AF 105mm f/1.4 for full-frame.
The Sigma 105mm f/1.4 DG HSM Art was released in 2018 as the 'Bokeh Master' prime for full-frame bodies — the widest aperture available at 105mm in the Art lineup. At approximately 1,720g (Sony FE version) and 105mm filter thread, it is among the heaviest Art-series primes, reflecting the optical mass required for f/1.4 correction at 105mm. Nine rounded aperture blades. HSM provides fast, quiet AF. 1.0m MFD.
The optical design uses 17 elements in 12 groups. Nine rounded aperture blades produce circular bokeh. The 105mm filter thread is very large-diameter. At approximately 1,720g (Sony FE version) the lens is substantial. Minimum focus distance of 1.0m. HSM provides fast, quiet AF with full-time manual override. f/1.4 maximum aperture. Full-frame coverage.
The 105mm f/1.4 perspective combines portrait telephoto compression with an aperture one full stop faster than f/2 alternatives: at 105mm f/1.4 on full-frame, depth of field is extremely shallow at portrait distances (1.5-3m), providing maximum subject separation from background. The 105mm focal length flattens features more than the 85mm standard portrait focal length — the combination of 105mm compression and f/1.4 defines the 'Bokeh Master' positioning.
On the used market the Sigma 105mm f/1.4 DG HSM Art is available at premium Art-series prime pricing. Condition checks: HSM AF response, 105mm front element for marks, aperture ring operation. Weight (~1,720g for Sony FE) makes it a dedicated tripod or monopod lens for extended sessions. Compatible with full-frame and APS-C bodies in the specified mount.