No, this is a fully manual cine lens. It does not have autofocus motors, as it is designed for precision manual pulling using its geared focus ring.
Yes, the Samyang 35mm T1.5 covers Full Frame sensors (36x24mm), making it compatible with cameras like the Sony A7S III, Canon 5D, or Panasonic S1H.
While f-stops measure the physical aperture size, T-stops (Transmission stops) measure the actual amount of light reaching the sensor, which is more accurate for video exposure consistency.