How to set the parameters of the camera when photographing jewelry on Taobao, such as jade. And how to make lamps?

Generally there is one light at 45 degrees on the left and right. Add a light on top.

If it is an APS-C format SLR, it is recommended that the lens be a 35mmf2.8 lens (distortion is the smallest at this focal length and closest to human vision)

Take a 35mmf2.8 fixed focus For example, the parameters are as follows: the shutter speed is guaranteed to be 1/35, and the aperture is reduced to f4. Optimizing the aperture can ensure the sharpness of the focus point and also ensure a certain background blur. Use the lowest sensitivity of 100, or even lower. Maximize image quality. Use lights to make this parameter exposure accurate.

OK