In addition to their role in exposure, the choice of aperture, shutter speed and ISO have a significant impact on the look and feel of your pictures. The following statements elaborate on or reinforce that, and it’d be good to internalise these too. The combination of aperture (f-number) and shutter speed determines exposure (another important factor in determining exposure is ISO sensitivity, but in the discussion that follows we will assume that ISO sensitivity is fixed). One of the first things you must learn as a new photographer is the relationship between ISO, aperture and shutter speed.Known as the “exposure triangle,” this is the basis of the photography world, as addition and subtraction are in the math realm. Understanding Shutter Speed, Aperture, Film Speed (ISO) & The Relationship Between Them February 25, 2019. NOTE: There is a reciprocal relationship between shutter speed and aperture. Combining Aperture and Shutter Speed. If you change one of them, then you will see the exposure level indicator in the viewfinder/LCD moves accordingly. This means that if you change one of them, you have to change at least one of the other to get the same exposure value as before the modification. But unless you know the relationship between shutter speed and aperture it may not happen very often. You can get the same amount of light if you change the shutter speed and aperture settings at equivalent amounts. For example, 1/30 at F5.6 is the same as 1/8 at F11. The higher you have your shutter-speed setting (1/4000), the faster your shutter will close, allowing you to capture subjects in motion. In this article I’ll talk about how to use the shutter speed and aperture values efficiently to get properly exposed photos. Ultimately, a faster shutter speed freezes actions. What happens when you adjust the aperture value. And they do so in relationship to each other. Like aperture, shutter speed can be controlled in manual mode, but an easier option is to use shutter priority mode (S or TV on your camera dial). This allows you to control the shutter speed and the camera will determine an aperture to match for a well-exposed image. likewise, slower shutter-speeds (1/4), capture more motion which creates a blurr. I’ve thought about covering off some of the basic principles of photography a few times on this website, but often find myself coming to the conclusion that someone else will have done a better job. IMPORTANT: Changing the shutter speed also affects motion blur . Shutter speed, aperture, and ISO all affect the exposure of a photo. ISO works alone, whereas aperture and shutter speed work together. Note: To get full control of your camera’s shutter speed and aperture values you need to put it in Manual Mode. Shutter-speed controls time and motion.