However, the same 1/50 sec shutter speed exposes the sensor for half the time of a shutter speed of 1/25 sec. For instance, a shutter speed of 1/50 sec is one stop slower than 1/100 sec, which means the sensor is exposed for twice as long. The three camera settings that give you control over the exposure - aperture, shutter speed and ISO - can each be measured in stops. Decrease it by one stop, and the exposure level is halved. Increase the exposure by one stop, and the camera sensor receives twice the level of exposure. Understanding exposure in photographyД®xposure - allowing light to hit the camera sensor to record an image - is measured in what's commonly referred to as 'stops', with each stop representing either double or half the level of exposure of the adjacent stop.

Now, let's take a look at some of the common questions new photographers have about exposure. Photographers now have more control over exposure than ever before. It's also worth remembering that at one time, shutter speed and aperture were the only exposure variables you could change from one shot to the next as the ISO was set by the type of film you were using, but the introduction of digital cameras has made it possible to change ISO on the fly rather than unloading film or switching bodies.

How to change iso in aperture software