How to adjust the various parameters of the camera when taking pictures of trinkets

Generally speaking, you need a large aperture to blur the background, so that the subject you want to shoot---small accessories, such as aperture f1.4 f2.8 f3.5 f4.0, etc. It is a large aperture. Other parameters depend on your shooting environment. If the lighting is not good, increase the ISO parameter to make the shutter faster. Of course, it is best if you can use a tripod to shoot in a still state