Shutter iso and aperture settings

ISO, shutter speed, aperture and exposure compensation are all different devices for camera to control exposure system. Generally speaking, their adjustment principles are allocated according to the principles of measurement and exposure systems.

ISO: If it is adjusted, generally speaking, ISO 100 can be used when the outdoor light is bright in normal daytime, and ISO 200-ISO 800 can also be used when the light is dim. If you don't use flash for indoor shooting, you can improve the sensitivity and ensure the shutter speed. Sensitivity is not a fixed set value, and can be set according to specific shading requirements.

Shutter speed: the adjustment of shutter is based on the value given by metering system and aperture. Under the same exposure, the larger the aperture, the faster the shutter speed; Conversely, the smaller the aperture, the slower the shutter is required.

Exposure mode

After we decide the shutter speed ourselves, the camera metering system will automatically select the appropriate aperture F value (which can be a stepless F value) according to the light conditions at that time. Digital cameras equipped with exposure mode dial usually engrave the letter "S" on the dial, which stands for the required shutter mode. Shutter priority mode is suitable for photography that needs to control the shutter. High-speed shutter can condense action, and slow shutter can turn moving vehicles into light beams.