爱上原相机用英文可以说成 "to fall in love with a film camera"。来源方面，这句话可能源于对于用胶卷相机拍摄照片的热爱，或者对于那些经典的、使用胶卷相机拍摄的照片的美好回忆。
下面是一些例句：
I fell in love with a film camera when I was in high school and I've been shooting with film ever since.
I love the way that film cameras capture pght and color. They make every photo look so beautiful.
I'm so glad that I discovered my passion for film photography. It's been such a rewarding hobby for me.
以上例句的中文翻译如下：
我高中时爱上了胶卷相机，从那时起一直在用胶卷拍摄。
我喜欢胶卷相机捕捉光线和色彩的方式。它们让每张照片看起来都那么美。
我很高兴发现了我对胶卷摄影的热情。这对我来说是一项非常有意义的业余爱好。