Photographs capture memorable images, such as a child's heartwarming smile or an adult's heartwarming, contorted expression of anguish. Make a moment last forever with this Groupon.
Choose Between Two Options
- $49 for a 3-hour photography lesson for one ($99 value)
- $89 for a 3-hour photography lesson for two ($198 value)
Whether creating a glossy print or a digital JPEG, photography is still all about capturing light. Check out Groupon’s examination of exposure to explore one tool for getting the perfect image.
Exposure: Let the Light Shine in
As complex as it seems, photography is a simple phenomenon requiring only light-sensitive material inside a dark box and a hole with a shutter. As the shutter opens, light streams through the lens, exposing a piece of film or an SLR's digital sensor to the image outside the box. Thanks to that exposure, the once-fleeting light becomes a photograph, rendered in precise detail and preserved for all posterity.
The exact exposure depends on the shutter speed, which can last as short as 1/2500th of a second to as long as several hours. A faster shutter speed captures faster action but requires more light and therefore a larger opening—or aperture—which shortens the field of focus. Conversely, a slower shutter speed needs a much smaller aperture to capture the same amount of light, though this also exposes the camera to the image for a longer time, making the stars look like lines drawn across the sky or a waterfall look like a solid white curtain draped from a giant's towel rack. Of course, a proper exposure is a matter of balance—too much time in bright light, and the photograph will wash out. Not enough time in the darkness, and the world will be nothing but shadows.