日本的八九式摄像枪，在以前曾经用于空战对抗训练中，替代实弹射击模拟开火。这种东西可能是最适合文文在飞行状态下拍摄的设备了）

Japan's Type 89 gun camera was used in aerial combat training; it substituted real gun fire with simulated fire. This kind of thing probably suits Bunbun the best when flying and taking photos.