I have a NIKON FM2. If I use ISO200 film, how do I adjust the relationship between shutter and aperture? I can’t remember those complicated data.

I sincerely hope it can help you, please be patient and digest it. ^^ You still need to know the basic photography concept of aperture shutter:

In fact, "aperture" is "a window hidden in the lens". Just imagine how much the sun can control the size of the window if the sun is strong. Light enters the room, and "aperture" is the same principle, used to control how much light enters the camera and shines on the film. Values ??such as ISO50/ISO200/ISO1600, etc.

Shutter speed is the time it takes to open the "aperture" window. The longer the time, the more light can enter; conversely, the shorter the time, the less light can enter. So you said that the large aperture is afraid of overexposure in broad daylight, so the shutter speed should be fast to prevent too much light from entering and causing overexposure.

Three exposure combinations: 1/250 second shutter speed and f/8 aperture size, 1/500 second and f/5.6, 1/125 second and f/11 can all achieve the same exposure. .

Each aperture adjustment will double and halve the amount of light entering the camera (aperture), (f/2.8, f/4, f/5.6, f/8, f/11, f/16 etc.), the standard 2:1 ratio, when the aperture is increased by one step, the shutter must be slowed down by one step to achieve the same exposure.