DSLRs and mirrorless cameras use a wheel on the camera body to set the aperture, but manual lenses and some made for Sony mirrorless cameras have an aperture ring on the lens itself.
Your aperture will need to be as wide as possible, which means setting it to the widest setting, which is the lowest f-number. We usually recommend f/2.8 or lower. DSLRs and mirrorless cameras use a wheel on the camera body to set the aperture, but manual lenses and some made for Sony mirrorless cameras have an aperture ring on the lens itself.