Compatible with Sigma DC 17-70/2.8-4 DC OS HSM Sigma DC 30/1.4 DC HSM; It is not compatible for SIGMA art 24-105/Canon EF 24-70/2.8L USM II/Canon EF-S 18-135/3.5-5.6 IS.
Auto-focus function; Built-in hand-shaking IS function; Gold-plated pins brings the great conductivity of signal transmitting; Aperture exactly being adjusted via the mount adapter; Full-frame adapter openings hole design, perfectly support Sony full-frame camera A7/A7R
Compatible with Tamron lens: Tamron SP 24-70/2.8 Di VC USD Tamron SP 70-200/2.8 Di VC
Canon Zooming Lens; EF 8-15/4L USM fisheye / EF 17-40/4L USM / EF / 70-200/2.8L IS USM II/ EF 70-200/4L USM / EF 70-200/4L IS USM / EF 20-35/2.8L (Ver.18). EF 2-5 EF EF 5/4-5.6 USM EF-S 18-55/3.5-5.6 IS EF 28-80/3.5-5.6 II EF 28-90/4-5.6 III
Compatible with Canon Fixed Focal Lens; EF 100/2.8 USM Macro EF 135/2L USM EF 200/2.8L II USM EF 300/2.8L IS USM Extender EF 1.4x III EF 14/2.8L II USM EF 24/1.4L II USM EF 24/2.8 IS USM EF 35/1.4L US EF 50/1.2L