Aperture and shutter priority mode are semi auto modes for your camera. These can be very handy in different situations.

• In aperture priority mode you select the aperture and the camera will automatically select the corresponding shutter speed. Use this to simplify shooting when depth of field is your primary concern.
• In Shutter Priority mode, you select the shutter speed and the camera will automatically select the aperture. Use this when shooting scenes where motion in your priority.

Don’t overlook these modes, they can be very handy in situations where quick setting changes may be necessary.