胶卷的型号,通常分为120、135两种。这里介绍一下胶卷的装法。 120胶卷的装法: 在避光处打开相机后盖,将胶卷装入安放架上,再慢慢拉出胶卷黄黑纸,将纸首插入另一个胶卷芯子缝道内。左手轻轻按住胶卷,右手(顺方向)转动卷片旋钮(或摇柄)到能够看到黄黑纸上的黑色箭头(如一),对准照相机上的一个红点(如→·)。然后关上相机盖.并旋紧后盖螺丝.续继旋动胶卷至第一张胶片。若使用海鸥牌4型、4A型自动停片相机,可旋至旋不动为止,这表示胶片第一张已到、即可拍摄;如用海鸥牌4B Film models, usually divided into 120,135 two. Here to introduce the installation of film. 120 Film Installation: Open the back of the camera in a dark place, the film into the rack, and then slowly pull out the yellow and black film, the first paper into another film core slot. Gently press and hold the film with your left hand and turn the take-up knob (or rocker) with your right hand (forward direction) until you see the black arrow (yellow) on the yellow black paper and a red dot (→ ·) on the camera. Then close the camera cap and tighten the cap screws. Continue rotating the film onto the first film. If you use the Seagull 4 type, 4A-type automatic stop camera, you can spin until the fixed, which means the first film has arrived, you can shoot; such as Seagull 4B