Photographic terminology

1. Aperture: A variable opening in a lens through which light enters a film or digital sensor. Measured in units of f value. The smaller the number, the larger the aperture and the stronger the background blur.

2. "B" door: As long as the shutter button is pressed or the button is released by cable, the "B" setting on the camera will keep the shutter open.

3.EV: exposure value is a number representing various combinations of aperture and shutter speed that can produce the same exposure effect.

4. Exposure compensation: modify the shutter speed or aperture according to the photometric parameters suggested by the camera to produce a specific effect (overexposure or underexposure), which is usually used in shutter priority or aperture priority mode. Represented by a small+/-button on the camera. The general rule is white plus black minus.

5.ISO: stands for the sensitivity of your camera digital sensor to light. The lower the number (ISO? 100), the lower the sensitivity, the higher the number (ISO? 3200) is more sensitive. The higher ISO allows you to shoot in low light.