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 aperture hole design, perfectly support Sony full-frame camera A7/A7R
Compatible with Sigma lens: 10-20 /3.5 EX DC HSM / 12-24/4.5-5.6 I DG HSM / 12-24/4.5-5.6 II DG HSM / 17-35/2.8-4 EX HSM ASPH / 17-70 /2.8-4 DC Macro OS HSM / 18-125/3.5-5.6 DC OS HSM / 24-70/2.8 EX HSM / 150-500/5-6.3 DG OS HSM / 20 /1.8 EX DG / 30/1.4 DC HSM / 35 /1.4 DG

Compatible with Canon lens:
EF 10-22 /3.5-4.5 USM / EF 16-35/2.8L USM / EF 16-35/2.8L II USM / EF 17-40/4L / EF-S 17-55/2.8 IS USM / EF-S 17-85/4-5.6 IS USM / EF 8-15/4L USM / EF-S 18-55/3.5-5.6 / EF-S 18-55/3.5-5.6 IS II / EF-S 18-135/3.5-5.6 IS / EF 20-35/2.8L (Ver.18) / EF 22-55/4-5.6 / EF 24-70/2.8L (I) / EF 24-105/4L IS USM / EF 28-70/3.5-4.5 II / EF 28-80/3.5-5.6 II / EF 28-135/3.5-5.6 IS USM / EF 35-80/4-5.6 / EF 35-350/3.5-5.6L / EF-S 55-250/4-5.6 IS / EF 70-200/2.8L IS USM (I) / EF 70-200/4L IS USM / EF 70-300/4-5.6L IS USM / EF 70-300/4-5.6 DO IS USM / EF 80-200/2.8L / EF 100-300/4.5-5.6 USM / EF 100-400/4.5-5.6L IS USM

Compatible with
TAMRON lens: 18-270/4.5-6.3 VC / SP 28-75/2.8 / 24-70VC / SP 70-200/2.8 Di VC / SP 150-600mm f/5-6.3 Di VC USD / 90/2.8（172E） / 28-75/2.8 XR Di LD / ZE Distagon 21/2.8 / ZE Distagon 15/2.8 / ZE Makro-Planar 50/2 / ZE Makro-Planar 100/2
Compatible with Canon lens: EF 14/2.8L / EF 20/2.8 USM / EF 24/1.4L II / EF 24/2.8 (old version) / EF 35/1.4L USM / EF 40/2.8 STM / EF 50/1.2L USM / EF 50/1.4 USM / EF 50/1.8 II / EF 50/2.5 macro / EF 85/1.2L II USM / EF 85/1.8 USM / TS-E 90/2.8 / EF 100/2.8L IS USM macro / EF 135/2L USM / EF 180/2.8L macro / EF 200/2.8L II USM / EF 300/4L IS USM / Extender EF 1.4x III / Extender EF 2x (I) / Planar 50/1.4 / Planar 85/1.4 / EF 180mm f/3.5L Macro USM