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Understanding Stop And Triangular Exposure In Photography

Posted by Learn Photo on Kamis, 10 Desember 2015

In photography, the word "stop" every so often we hear and read. No, not stop it, not stop that means stop. The stop here is a term in photography. Examples of their use may be like this: "because his picture look over, I lose one stop", well that way.

If until this very second, said the stop in photography still leaves you confused, please check out this brief explanation.
Definition Stop
Stop in photography more or less owns the meaning change the amount of light received the sensor/film so that affects exposure photos. Add one more light means stop twice, add 2 more light means stop 4 times. Subtract one stop darker means half the time. A one-stop means changing the amount of light by as much as a multiple of 2.

As you may know, the amount of light received our sensor name exposure. And ride one stop means increasing exposure as much as 2 times. The action of raising or reducing exposure can be done by changing one or combined the three elements that make up the triangle of exposure: shutter speed, aperture and ISO. (further explained in this article: understanding the concept of Exposure).

Somewhat abstract huh? Okay one perumpaan so obvious. Let's say your in bed there are 4 100 watt bulbs and all four are lit. Because the stop is a dark light change, then down one stop does it mean you turn off two lights so only two lights are turned on. While up one stop means you should carry 4 light again with the same wattage. In this case, the room is a sensor in a digital camera for the light output is exposure.
Stop and Shutter Speed

shutter speed measuring how long the sensor receives light. The longer shutter speed means more and more of the light sensor which means accepted raise exposure. In shutter speed, a full stop is easy to remember because it is the result of the Division of two numbers (with rounding): 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000, etc. Moved one stop means the jump once, for example from 1/30 to 1/125. Moved 2 stop means the jump twice.
Stop and ISO

Also easy in ISO, stay 2 times means you ride one stop. ISO 100 to ISO 200, one stop, 200 to 400 and so on. When asked how many stops from ISO 100 to 1600? well smart, there are 4 stops. Understand the concept of ISO here.
Stop and Aperture

Somewhat more difficult in aperture because the number is melomcat-jump: f/1, f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16 and so on. Understand the concept of Aperture again here.
What Is The Relationship With The Third Stop?

Let's say you use the initial settings of the camera like this: 1/125, f/8 and ISO 100. Because the results of the photo under exposure (dark) you ride one stop which means it could be three things: 1/60, f/8, ISO 100 (only the shutter has changed). Or 1/125, f/5.6 ISO 100 (aperture just changed). Or 1/125, f/8 ISO 200 (only ISO change). All changes is worth a stop.

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