Like I would have two Pentax K1000s or two Cannon AE1s, whichever one, I would put black and white film in one, color film in another, so I can compare the shots.

就像我有两台宾得 k1000 或者两台佳能 AE1s，不管是哪一种，我都会把黑白胶片放在一种，彩色胶片放在另一种，这样我就可以比较镜头。