- Exposure Triangle Basics
Ap eture controls the amount of light your DSLR allows into the exposure by measuring the lens hole width. This allows you to control the amount of light that is feeding into your image. Aperture values are expressed in numbers called f/stops – the smaller the f/stop number means the more light that is coming into the camera.
Example: f/1.4 lets in more light than f/22, which is like a pin hole.
Apart from controlling the amount of light into the exposure, aperture is also used to change the depth of field (blur in the background).
A smaller aperture, like f/1.4 lets in a lot of light, compared to f/22 which is like a pin hole.
ISO sensitivity measures how your DSLR detects light.Changing the ISO allows you to change the sensitivity of the sensor on your camera. The higher the ISO number, the more sensitive to light the sensor in the camera is, and is generally used in darker environments to get faster shutter speeds. ISO values double with each increase in light sensitivity, so the lower your ISO value, the more detail you'll get in your photograph.
As a general rule, use higher ISO value like 800 in a dark setting, and when you are outside on a bright sunny day, use a lower setting like 100 or 200.
Shutter speed measures how long your camera shutter, and how long the digital sensor on your camera is exposed to light. Shutter speed is measured in fractions of a second, and the larger the number, the faster the shutter speed. Faster shutter speeds (i.e. 1/2000 of a second) are generally used to freeze fast motion subjects.
Slower shutter speeds (i.e. 1/30 of a second) are generally used in low light situations and deliver richer detail and colour. Each interval doubles the time the shutter speed is open for (i.e. from 1/1000 of a second to 1/500 of a second to 1/250 of a second). Daylight shots are optimal at around 1/125 of a second. To avoid camera shake for any shutter speed slower than 1/60 of a second, consider using a tripod or resting your camera on a stable surface
The photographer's secret: Don't shoot on a shutter speed that is anything less than 1 on the focal length of the lens.
Example: For a 250mm lens, only use a shutter speed of 1/250 of a second or faster, unless you have a tripod
On Monday 14 November, we’ll get to enjoy the brightest, closest ‘supermoon’ since 1948. And it won’t be back until 2034, so grab your cameras and let’s get shooting!
Liz Carlson, of Young Adventuress, talks about her time in Svalbard and shares her tips for capturing some impressive Polar Bear images.
Create a party photo booth with Creative Park
Easy ways to use print to style and organise your home
Quick ways to make some statement artwork for your master bedroom
Stylist Jason Grant gives you some inspiration for your baby's room.
Discover easy ways to bring creativity into your home office space
Thinking of Stepping up to a Full Frame camera? Learn more about the Advantages of Canon Full Frame bodies with this article from Matt Vandeputte.
The best way to get better at photography is to go out and do it more. We’ve created LEAP to help you get — and stay — motivated to do just that.
When to use a fish-eye lens, in 23 seconds.
We sat down with the queen of surf photography to pick her brain for tips and tricks to shooting in the sea.