I just got a sony a6500 and was using a Canon 5D MIII with the following lenses:
Sigma 35mm f/1.4
Canon 16-35 f/2.8
Canon 70/200 f/4
I wanted to know what adapter I should use to use these lenses
Normally you can use this: Sigma MC-11 Adapter Canon EF an Sony E but after that you always lose in quality and often in auto-focus. Maybe look on some specialized forums. If you plan to use the auto-focus of your lenses I think it's dead.