Suffice it to say, 30-45 degrees is considered a narrow field, 50-60 degrees considered a normal field, 65-70 degrees considered widefield, and 78-85 degrees considered an ultra-wide field of view.

• 一般来说，30-45度属于窄的类型，50-60属于中等，65-70属于广角，78-85属于超广角了。