How to shoot a black and white background?

The main light is generally the figure light. As the saying goes, according to the subject matter and the texture you want to express, whether to use soft light or hard light depends on how you want to express it. Soft light will better reflect the details, and strong light will better highlight the texture. Secondly, we should pay attention to the tone of the overall picture. Whether you want a high-profile photo or a silhouette effect depends entirely on how you want to express it.

Auxiliary light is generally used to render the background to set off the main body. It can be played on the background cloth or on the object to be photographed, such as sidelight.

Specifically, the equivalence and camera settings you mentioned depend entirely on the photographer. For example, how much fire a chef needs to cook, stir-fry for a few minutes and seconds, and put a few grams of potatoes and fungus. Other similar environmental factors and creative purposes determine this setting.

Then there is the camera. Any camera can take pictures regardless of brand and model. Even a film SLR without metering can take good photos.