Geseller 4pcs 2.1mm F1.8 Monofocal 150 Degree AOV Board Mount M12 /MTV CCTV Camera Lenses 1. This 2.1mm monofocal fixed iris board mount lens provides maximum 150degree viewable angle with 1/3 format image sensor. 2. Supports 1/4 format image sensor for 10 to 20% less of the maximum viewable angle. 3. This lens supports surveillance camera with IR night vision capability and it is ideal for viewing of a very large indoor/outdoor area. 4. Be commonly used for dome and bullet cameras. 5. This item includes 4 lenses.