What mode does SLR stainless steel use?

If the soft light is not bright enough, it is recommended to use a flash. The high-speed synchronization of flash can ensure that the picture is clear and fill the light when ISO is the lowest. Use M range, fixed focus lens, manual exposure (white background plus exposure compensation, black for exposure reduction compensation), flash using high-speed synchronization mode. Don't shoot stainless steel too close, it is easy to reflect light when it is close. The light should be positioned at a 45-degree angle to the side.