![]() Likewise, light intensity can be changed when an exposure is made inside the camera. But it has changed by two stops in total. four bulbs in total now), the light intensity increases by another stop. Taking the example further, if you added two more bulbs (i.e. ![]() One stop represents the doubling or halving of light. For instance, if you start with a single bulb and add another bulb of same type and intensity, the light intensity will have increased by one stop. In photography, the term ‘stop’ represents a relative change in the brightness of light. Typical settings for aperture, shutter speed and ISO Stops: What is it? The most commonly available values for each of the three settings are listed in the table below ( the list is not exhaustive, of course). You can claim to have made a good exposure if the image seems acceptably bright and without any clipping in the shadows or the highlights ( pixels are 100% black or 100% white as indicated by being pushed up against the left or the right of your histogram). In most cameras, you can choose the value for each of the three settings before making an exposure. These three settings – aperture, shutter speed and ISO speed, constitute what is called as exposure triangle. This is, more or less, the sequence of events that occur when you press the shutter release button and after which you have captured an image, or let’s say – made an exposure. Light from your subject enters the lens, passes through an opening/hole ( called aperture), hits the sensor and gets recorded for a fixed duration ( called shutter speed) on the sensor that has a specific responsiveness or sensitivity ( called ISO). It doesn’t matter what type of camera it is, the process is fundamentally the same.Īt the heart of your photography lies the image sensor (or a film, as the case may be). A DSLR camera may be substantially different from the other types of cameras in its construction as it consists of a reflex mirror that allows it to feature a through-the-lens optical viewfinder. While they may differ in the technology they use, the principles of image-capturing is the same. There are different kinds of cameras out there – DSLR, mirrorless, film, or the camera in your phone, for that matter. Feel free to jump to the last section to get straight to the rule of equivalent exposure. To get a better understanding of the topic, it would be wise to take a look at how a camera functions and how an exposure is made. The rule of equivalent exposure perfectly complements the Sunny 16 Rule. There are a number of combinations of aperture, shutter speed and ISO that can be used to achieve this equivalent exposure. ![]() The rule of equivalent exposure, in the simplest terms, allows you to make the exact same ( or let’s say, equivalent) exposure using different settings for aperture, shutter speed and ISO. When you are capturing an image, you are essentially making a properly exposed image on the sensor using settings for aperture, shutter speed and ISO which are the factors that form the exposure triangle. ![]() While it may seem pretty straightforward what a camera does, quite a lot happens inside the camera when you press the shutter release button to capture a photograph. It’s amazing how a camera can freeze a moment in the present and lets you savour it in the future. ![]()
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