As a beginner, a newbie perhaps, I always come to a time specially when taking pictures that I’m utterly confused and puzzled. Not until I found an article talking teaching digital photography. I’m really confused about ISO, Shutter Speed and Aperture. Imagine yourself in a room looking through a window. the size of the window is the Aperture, the closing flaps limits the amount of light from the outside to enter the room. Shutter Speed is the amount of time the window is opened, close it and the room is dark, open it slowly and room slowly turns brighter. ISO is looking through a sunglass or a reading glass. Here is a beginners guide to Digital Photography.
1. Aperture –
it is the amount of light that enters the camera lens. In our own eyes, our iris collects the light. Imagine yourself when in a room and when the light is suddenly turned off, then it turns to a dark place. Our iris adjusts to the right amount of light by changing its diameter so that it will collect enough light from the surrounding enabling us to see after few minutes. Notice that after enough time we can see, not so bright but between darkness but we can see a bit properly. That is how Aperture works, adjusting the iris of the lens to enough diameter or size to collect enough light to have clear, not so bright or darker pictures. The larger the diameter size means the larger the light that enters the lens, apparently, the smaller the diameter the smaller the amount of light that enters.
This Picture was taken using Canon s5Is at a Cave in Danao, Bohol. One of the tourist attractions in Bohol, Philippines. Even with the darkness of the Cave, using lights from the head gears of the tour guides, the lens accumulated enough light and shoots not so dark and not so bright.
2. Shutter Speed – it is the amount of time the lens is exposed. Shutter speed is expressed with a numerator and a denominator. Like 1/1000, 1/500, 1/250, 1/100 etc. The bigger the denominator is the faster or the quicker the shutter opens and captures an image. 1/1000 is expressed in 1 thousand of a second. Just divide one second into 1000 and thats how fast the shutter opens and is exposed to capture an image. The smaller the denominator means the lens is exposed a bit longer. 1/250 is Shutter Speed is 250 of a second, like dividing a second by 250 and that the time the shutter is opened and exposed. When taking pictures and needed to be quick, a larger denominator is recommended.
Capturing this image requires a slower shutter speed. I think I’m using 1/100 shutter speed. It gives life to a picture. But if using a faster shutter, the water will be frozen in mid-air. It may look like no life at all. No movement in a still picture.
3. ISO – imagine yourself using a dark sunglasses. Our view using a sunglass will be darkened. But using a reading glass, our view is brighter. ISO works the same way (one way or the other). The higher the ISO is, the brighter the picture, the lower means the darker. ISO is the sensitivity of the Image Sensor of a camera gear. ISO helps a lot specially when taking pictures manually. When adjusting the camera’s Shutter Speed and Aperture to the right amount but the picture is darkened, adjusting the ISO higher will help to brighten up the picture but also compensating itself to balance with the Aperture and Shutter Speed. It results to a clear and bright image, specially when taking pictures with dark backgrounds. For help, use Auto ISO mode, the Camera knows what to do, but if you’re not contented, use manual ISO setting.
Guess thats all for now, been busy for the moment at school. Thanks!