Desired characteristics of cameras

• Global shutter (to avoid rolling shutter effect cause by vibrations)
• Trigger (we need synced left and right images)
• Focus control (auto focus likes to hunt for focus, destroying images. We want to control focus through software)
• Color

To avoid blurriness we need fast shutter speed. That means we want enough light on the sensor. A small sensor is light, has large depth of field and requires small, light lenses. However it acquires less light and therefore has slower shutter speed.