'Shutter speed' and 'exposure time' refer to the same concept, where a faster shutter speed means a shorter exposure time.īy the Numbers. The shutter speed specifically refers to how long this light is permitted to enter the camera. SHUTTER SPEEDĪ camera's shutter determines when the camera sensor will be open or closed to incoming light from the camera lens. The next few sections will describe how each setting is specified, what it looks like, and how a given camera exposure mode affects their combination. For example, aperture affects depth of field, shutter speed affects motion blur and ISO speed affects image noise. The key, however, is knowing which trade-offs to make, since each setting also influences other image properties. One can therefore use many combinations of the above three settings to achieve the same exposure.

EXPOSURE TRIANGLE: APERTURE, ISO & SHUTTER SPEEDĮach setting controls exposure differently:Īperture: controls the area over which light can enter your camera Shutter speed: controls the duration of the exposure ISO speed: controls the sensitivity of your camera's sensor to a given amount of light Furthermore, just as the rate of rainfall was beyond your control above, so too is natural light for a photographer.

In photography, the exposure settings of aperture, shutter speed and ISO speed are analogous to the width, time and quantity discussed above.

Alternatively, for the same duration left in the rain, a really narrow bucket can be used as long as you plan on getting by with less water. For example, for the same quantity of water, you can get away with less time in the rain if you pick a bucket that's really wide. The key is that there are many different combinations of width, time and quantity that will achieve this. You just need to ensure you don't collect too little ('underexposed'), but that you also don't collect too much ('overexposed'). While the rate of rainfall is uncontrollable, three factors remain under your control: the bucket's width, the duration you leave it in the rain, and the quantity of rain you want to collect. Achieving the correct exposure is a lot like collecting rain in a bucket.

Iso 100