Using a tripod, switch to manual focusing. General products are small aperture shooting, and the aperture priority file is used for shooting. Pay attention to the shutter value in this mode when shooting. If it does not meet the requirements, you can adjust the exposure compensation to correct it, or directly switch to manual mode to set the aperture and shutter values yourself. Because you don't know the characteristics of the product you shot, you can't give you an accurate aperture and shutter value, which requires you to adjust your choice slowly.