Disposable film cameras are equipped with a simple lens on a simple cassette. The lens has a short focal length, mostly a simple 3-piece Kirk structure, and the aperture is not adjustable. Around F8 or F11, the inter-lens shutter speed is only 1/100 second. It can take relatively clear photos outdoors in good light, but it only exists for emergency recording without a camera. The film taken cannot withstand enlargement. The vignetting, dispersion, and distortion are very obvious. It is not something that can be used without it. At that time, Kodak and Fujifilm had similar products, and the price was about 50 to 60 yuan, which was nearly twice as expensive as the roll itself.
This kind of camera is disposable, but if you want to continue to use it, there is no way. It is just too troublesome to have to disassemble it. It is really not worth the money.