Today we are going to talk about the basic things we need to know about a camera’s shutter speed. This is “Learn with BMK” and I’m Harsha Vijayan. Welcome to our channel. Shutter is a mechanical door in between lens and sensor. Shutter speed is the time taken by this mechanical door to open and close. So, the working of this mechanical door called shutter – it comes in the form of two curtains. Front curtain and Rear curtain. So, when we take a photograph, this front curtain opens, and through this gap the light enters the sensor and later, the light is blocked with the rear curtain. This is the working of a shutter. As it is a matter of speed, we talk about it in terms of time. As it happens very, very fast, we measure it in seconds. Meaning, we measure shutter speed in seconds. We can see in our camera, shutter speeds ranging from 30 seconds to 1/4000. In some cameras, it goes up to 1/8000. Did you notice something? 1/4000. That means, in the time taken by a second to be divided by 4000, a shutter opens and closes. This is what I told you earlier, it happens very quickly. Okay, so we understood how a shutter speed works. But, what is this shutter speed used for? Hm? So the thing is, camera sensors are very sensitive to light. The amount of light that enters through the lens can be controlled by Aperture. But, how long this light falls on the sensor is very important. We might have seen some photographs which looks too white or has had too much light enter it. The reason behind it is, the amount of light that enters through the lens falls on the sensor for too long. Technically, it is referred to as Overexposed photo. Similarly, when light falls on the sensor for less than the required amount of time, photos become very dark or looks blackish. We technically refer to them as Underexposed photos. When using fast shutter speed, less light falls on the sensor. At the same time, when using slow shutter speed, more light falls on the sensor. Okay, so shutter speed controls light. Right? That’s not all, now comes the important part. Freezing an action, camera shake and motion blur – all depends on the shutter speed. To freeze an action that takes place at high speeds, we use a fast shutter speed. For example, like we see on the screen, the horse running – we can see that it has captured all the action, posture, correct detailing, everything. Similarly, the car speed-drifting with the sand flying everywhere, planes flying, bird flying… To freeze such fast actions, we need to use shutter speeds above 500. Another thing we need to pay attention to is that – when we use fast shutter speeds, light falls on the sensor only for a short duration. So, when we capture fast actions using fast shutter speeds – it works best in bright light. Next… is something you need to pay attention to when you use slow shutter speeds. That is, camera shake. None of our hands are very steady. So, when we use slow shutter speeds, even the tiniest of camera shakes affects the picture very much. To avoid this from happening, I will share with you a small tip. Consider the focal length we are using – for example, we are using 50mm. Then, we must choose a shutter speed of 1/50 or above. If we are using 70mm, choose a shutter speed of 1/70 or above. Now, its time for camera study. Everything without motion is sharp; everything with motion is blur. Then, it’s motion blur. For example, we can see in this picture – all the buildings in this are sharp. Because they have no movement. So, this has no camera shake. But, all the cars on the road are blurred. Because they have movement. This is an effect of slow shutter speed – “motion blur”. When we use this creatively… we can see in the next picture… This is a waterfall. All the rocks in this are sharp because it has no movement. But at the same time, the water that falls… that has a movement. Therefore, it is blurred and is a little milky. This is how we have creatively used motion blur. “How to creatively use shutter speeds” – we will be doing a separate video on it in the future. I believe everyone has got a basic idea of what shutter speed is from this video. If you liked this video, please do like, comment and share. To get notifications at the right time, click on the ‘bell icon’. You may ask us any questions you might have in the comments section. This is me Harsha Vijayan signing off with “Learn with BMK”.