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Understanding Exposure - ISO, Aperture and Shutter Speed Explained

Understanding Exposure - ISO, Aperture and Shutter Speed Explained
What controls exposure? ISO ratings determine the image sensor’s sensitivity to light, each value of the rating represents a “stop” of light, and each incremental ISO number (up or down) represents a doubling or halving of the sensor’s sensitivity to light. The Aperture controls the lens’ diaphragm, which controls the amount of light traveling through the lens to the film plane. The aperture setting is indicated by the f-number, whereas each f-number represents a “stop” of light. The Shutter Speed indicates the speed in which the curtain opens then closes, and each shutter speed value also represents a “stop” of light. When these three elements are combined, they represent a given exposure value (EV) for a given setting. ISO Speed ISO is actually an acronym, which stands for International Standards Organization. Aperture A lens’s aperture is the opening in the diaphragm that determines the amount of focused light passing through the lens. Shutter Speed What is "Auto Bracketing"? Conclusion

blubbr - Play & create video trivia games Ugly Hedgehog - Photography Forum FlowingData | Data Visualization, Infographics, and Statistics Pictures, News Photos, Picture Slideshows & More | Reuters.com Worksheets, Lesson Plans, Teacher Resources, and Rubrics from TeAch-nology.com 360 Degree Aerial Panorama | 3D Virtual Tours Around the World | Photos of the Most Interesting Places on the Earth | AirPano.com Inspire Me Now World War I in Photos: Introduction - In Focus A century ago, an assassin, a Serbian nationalist, killed the heir to the throne of Austria-Hungary as he visited Sarajevo. This act was a catalyst that ignited a massive conflict that lasted for four years. More than 65 million soldiers were mobilized by more than 30 nations, with battles taking place around the world. Industrialization brought modern weapons, machinery, and tactics to warfare, vastly increasing the killing power of armies. Battlefield conditions were horrific, typified by the chaotic, cratered hellscape of the Western Front, where soldiers in muddy trenches faced bullets, bombs, gas, bayonet charges, and more. On this 100-year anniversary, I've gathered photographs of the Great War from dozens of collections, some digitized for the first time, to try to tell the story of the conflict, those caught up in it, and how much it affected the world. Use j/k keys or ←/→ to navigate Choose:

Top 10 Thinking Traps Exposed Our minds set up many traps for us. Unless we’re aware of them, these traps can seriously hinder our ability to think rationally, leading us to bad reasoning and making stupid decisions. Features of our minds that are meant to help us may, eventually, get us into trouble. Here are the first 5 of the most harmful of these traps and how to avoid each one of them. 1. “Is the population of Turkey greater than 35 million? Lesson: Your starting point can heavily bias your thinking: initial impressions, ideas, estimates or data “anchor” subsequent thoughts. This trap is particularly dangerous as it’s deliberately used in many occasions, such as by experienced salesmen, who will show you a higher-priced item first, “anchoring” that price in your mind, for example. What can you do about it? Always view a problem from different perspectives. 2. In one experiment a group of people were randomly given one of two gifts — half received a decorated mug, the other half a large Swiss chocolate bar. 3. 4.

The Year in Pictures 2015 THIS was the year of the great unraveling, with international orders and borders challenged or broken, with thousands of deaths, vast flows of migrants and terrorist attacks on some of the most cherished symbols of civilization, both Western and Muslim. Palmyra and Paris (twice). Aleppo, Homs, Kobani and even San Bernardino, Calif. The conflict spurred the migrants lapping against the shores of bourgeois Europe, a million or more, huddled in small boats or crammed into airless trucks, abused by human traffickers, thousands dead on the journey, prompting both empathy and backlash. Just look. The outrages of Boko Haram and the Shabab in Africa. The ruins still in Gaza, a year after a brutal and inconclusive war, and Israel hunkering down in a region losing its compass. Even the Earth seemed slightly unhinged — the ice caps melting, sheep stuck in the smog of Beijing, huge snowstorms and floods, a major earthquake in Nepal, one of the world’s poorest countries.

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