Tatiana Kukanova – A Quick Refresher about ISO, Shutter Speed, and Aperture


For people who are just getting started with photography, it could be quite difficult to take 
pictures of good-quality without understanding what ISO, shutter speed, and aperture are. This is why I, Tatiana Kukanova, advise beginners to start learning about the “Exposure Triangle”. Although most cameras nowadays have Auto modes, it is still better to understand how ISO, shutter speed, and aperture work together to fully take charge of the process of capturing of your photos. This helps you have the best results from your camera. In this post, I will give you a quick guide about the Exposure Triangle.

Here’s Tatiana Kukanova’s Beginner’s Guide on ISO, Shutter Speed, and Aperture:

Shutter Speed

The shutter speed refers to the length of time the shutter is open to allow light into the camera sensor. Slow shutter speeds let more light to pass into the camera sensor and are usually used when the photographer is shooting in low-light and at night. On the other hand, fast shutter speeds help in freezing motion.

Aperture

An aperture is a hole within the lens where light travels into the body of the camera. As the size of the hole increases, the amount of light that passes to the camera sensor also increases. This also controls the depth of field – the sharp portion of the scene. The aperture and depth of field are indirectly proportional, so when the aperture is small, the depth of field is large and vice versa. Aperture is usually expressed in “f” numbers (‘focal ratio’).

ISO

When longer shutter speed and a wider aperture cannot be used, ISO is the way photographer brighten their photographs. Lower ISO numbers signify darker images, and higher ISO numbers signify brighter photographs. Warning! Be careful about setting your ISO too high because as ISO numbers increase, so does the visibility of graininess in your pictures.

 I hope this quick refresher helps you in the future. Happy shooting!

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