![]() In this case, retina would be your ‘image sensor’ and the pupil would be the ‘lens-diaphragm-opening’ Whenever there is a bright light, we tend to shrink our eyes so that we don’t get blinded by it. It works exactly like our eyes! Lets go back to the science chapter where we learnt that for our eyes to see clearly light needs to reach the retina through the pupil, which is the tiny black spot in the center of the iris. The size of the opening is referred to as Aperture and it determines the amount of light that enters your camera image sensor. ApertureĮvery lens has an opening through which light travels to the image sensor. While there are some who don’t like noise, there are some who would add noise while post processing. When I click at night or in a very dark place, I have to increase the ISO to maximum, if required. In a bright daylight I usually stick to ISO 100 or 200. The higher the ISO, the more the sensitivity and hence, more noise or grain. The lower the ISO, the lesser the sensitivity. Right now, concentrate on how the picture that was shot with ISO 3200 looks grainy and has noise in the background unlike the one photographed with ISO 400 which is smoother and detailed. When we discuss shutter speed later, we will see how it works. ![]() In the example below, I changed the shutter speed to get a similar end result even though it was shot with a different ISO. This would give you an understanding of how the image sensor reacted to the light. In the below set of photos, I kept changing the ISO but the rest of settings were not changed. ISO ranges from 100 – 6400 and can go even beyond depending on how advanced your camera is. ISO measures the sensitivity of the ‘image sensor’ and accordingly reacts to the available light. Inside your digital camera, there is a component called ‘image sensor’ which collects the available light and creates an image. It stands for International Organization of Standardization. Then we will see how they are connected to each other and how we can create a balance. I will start by explaining each one of them. The three key elements that work as a chemical process to create an image are ISO, Aperture and Shutter Speed When I started photo-shooting in Manual mode, I read these details again and again for months to figure it out and I am still reading, still learning. If you are new to this, it might take some time to understand and grasp it. It plays a vital role in making a picture It’s a long post with lots of information and details to talk about. Today, we will talk about three important elements – Understanding ISO, Aperture and Shutter Speed. ![]() Your emails and comments on Understand and Play with Light are much appreciated. Thank you so much for the support that you have shown towards the first post of the Photography Series.
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