By definition, the shutter speed is the time frame when you open the shutter on the camera. More easily, shutter speed means less time in which our sensor ‘sees’ a subject to our photos. Simply put the shutter speed is the time between us pushed the button on the camera until the shutter button is returned to its original position.

So easy, we translate this concept in some use in cameras:

• Setting the shutter speed of 500 in your camera means the time span of 1 / 500 sec. Yes, short as it is. As for the exposure time of 30 seconds, you’ll see something like this: 30”
• Setting the shutter speed on your camera is usually in multiples of 2, so we’ll see a row like this: 1 / 500, 1 / 250, 1 / 125, 1 / 60, 1 / 30 ff. Now almost all cameras also allow setting 1 / 3 stop, so less is more movement of the shutter speed is more dense; 1 / 500, 1 / 400, 1 / 320, 1 / 250, 1 / 200, 1 / 160 … and so on.
• To produce a sharp image, use a shutter speed that is safe. Rules safe in most conditions is setting the shutter speed of 1 / 60 or faster, so the resulting image will be sharp and safe from the photos that ghosting (blur / out of focus). We can outsmart the safe limit of this with a tripod or use the Image Stabilization feature (discussed in upcoming posts)
• Limit the other safe shutter speed is: shutter speed we should be larger than the length of our lens. So if we use a 50mm lens, use a minimum shutter 1 / 60 sec. If we use the 17mm lens, use a shutter speed of 1 / 30 sec.
• Shutter speed to freeze motion. Use a shutter speed as high as reasonably achievable to freeze motion. The faster the object moves that we want to freeze the image, the faster the shutter speed is needed. To freeze the motion of a flying bird for instance, use the Shutter Priority mode and set shutter speed at the rate 1 / 1000 sec (ideally ISO set to auto option) so that the results are sharp. If you notice, sports a much idealized fashion photographer S / Tv this.
• Blur deliberates – the shutter speed to show motion effects. When photographing a moving object, we can deliberately slow shutter speed to show the effects of our movement.

By the definition of ISO is a measure of the level of the camera sensor sensitivity to light. The higher the ISO setting we are the more sensitive the sensor to light.

To get a clear picture of the ISO setting on our camera (ASA in the case of photographic film), just think about a community of bees. An ISO is a worker bee. If my camera set at ISO 100, it means I have 100 worker bees. And if my camera set at ISO 200 which means I have 200 worker bees.

The task of each worker bees is collecting light entering through the lens of a camera and make pictures. If we use a lens aperture of identical and equally we set at f/3.5, but I set my ISO at 200 while your 100 (think again of worker bees), then the picture who would have finished faster?

Broadly speaking, when we increase the ISO setting from 100 to 200 (the aperture is always constant – we lock the aperture at f/3.5 or through Aperture Priority modes – A or Av), we shorten the time required in the manufacture of a photo on the camera sensor we get to half (2kali faster), shutter speed of 1 / 125 to 1 / 250 sec. As we add more ISO to 400, we cut the time of making photographs until the other half: 1 / 500 sec. Every time Exposure shorten as much as half, we call for 1stop exposure raise.

You can try this sense in the case of the aperture, we try to set the shutter speed is always constant at 1 / 125 (or via the Shutter Priority mode – S or Tv), and change-change your ISO setting in multiples of 2; missal from 100 to 200 to 400 … and so on, look at changes in the amount of your aperture.

Often after buying a good digital slr cameras and point & shoot, we are fixated on auto mode for longer periods of time. Auto mode is most easily and quickly, but gave no creative satisfaction.

For those who want to “pass and go up a class” from the auto mode and want to channel the creative spirit into the photographs produced, it helps us understand the concept of exposure. Famous photographer, Bryan Peterson, has written a book called Understanding Exposure which includes the concept Exposure easily explained.

Member Peterson illustration of the three elements that must be known to understand the exposure, he named the three as a triangle relationship Photography. Each element in the photographic triangle is associated with light, how light enters and interacts with the camera.

These three elements are:

1. ISO – the measure of how sensitive the camera sensor to light

2. Aperture – how big the lens is open when the photo was taken

3. Shutter Speed ​​- the span of time ‘window’ in front of the camera sensor is open

The third element of interaction is called exposure. Changes in one element will lead to changes in other elements.

Parable Exposure Triangle

Probably the easiest way to understand the exposure is to give a parable. In this case I like the parable of the exposure triangle like a water faucet. Shutter speed for me is how long we open the faucet, the aperture is how wide we open the tap and the ISO is the strong encouragement of water from the taps, and water flowing through the taps is the sensor receives light cameras. Certainly not a perfect metaphor, but at least we got the basic idea.