What are EV and LV © 2005 KenRockwell.com. Home Donate New Search Gallery Reviews How-To Books Links Workshops About Contact What are LV and EV © 2013 KenRockwell.com. All rights reserved. This free website's biggest source of support is when you use those or any of these links when you get anything, regardless of the country in which you live — but I receive nothing for my efforts if you buy elsewhere. I'm not NPR; I get no government hand-outs and run no pledge drives to support my research, so please always use any of these links for the best prices and service whenever you get anything. October 2013 Better Pictures Nikon Canon Fuji LEICA All Reviews Introduction top LV, Light Value and EV, Exposure Value, are terms used to allow easy discussion of exposure and light without the confusion of the many equivalent combinations shutter speeds and apertures. LV refers to how bright the subject is.
You may have seen them if you like to read the fine print of camera specifications. EV and LV follow an open-ended scale. Easy, eh? Exposure value. Fast shutter speed, short exposure of a water wave. Slow shutter speed, long exposure of the wave. The EV concept was developed in an attempt to simplify choosing among combinations of equivalent camera settings, by the German shutter manufacturer Friedrich Deckel (de) in the 1950s (Ray 2000, 318).
Exposure value was originally indicated by the quantity symbol ; this symbol continues to be used in ISO standards, but the acronym EV is more common elsewhere. Although all camera settings with the same EV nominally give the same exposure, they do not necessarily give the same picture. Formal definition[edit] Extended exposure time of 26 seconds. Exposure value is a base-2 logarithmic scale defined by Ray (2000, p. 318): where N is the relative aperture (f-number)t is the exposure time (“shutter speed”) in seconds[2] EV 0 corresponds to an exposure time of 1 s and a relative aperture of /1.0. Camera settings vs. photometric exposure[edit] EV as an indicator of camera settings[edit] Table 2. -number. Light and Exposure Values (LV & EV) Light Value (LV) and Exposure Value (EV) are numerical scales for measuring the amount of light, and the exposure, respectively.
These are often confused - not least by the labeling on some cameras; the difference is that LV measures how much light there is, and EV measures how much of the light is allowed into the camera. The scale is logarithmic- that is, each step up on the LV scale is twice the amount of light, and a step up on the EV scale correspondingly halves the exposure. Typical values of LV in daylight vary between about 16 (extremely bright sun), down to around 10 (dark clouds) and of course, lower in very bad weather, at night or indoors. For most purposes, a range of (say) 2 to 18 covers most conditions where the photographer can still see their subject. Many light meters are not sensitive enough to reach even this range, although for some special purposes (such as astronomy) values beyond this range may be required. where Link Edit.
EV vs. f-stop - Photography QnA at BetterPhoto. Tim,The answer is YES. Going to +1 EV increases the amount of light reaching the film by 1 EV and is the same (by definition of EV) as opening the lens up by a stop. EV = Exposure Value Your camera manual mentions it is capable of metering 0-20 EV, and probably mentions this is for ISO (or ASA) 100 film speed.
It is the specification for the sensitivity range of your camera's meter. The definition of EV:EV is the "Additive Photographic Exposure System" with two equal definitions: First:EV = Av + TvAv = Aperture Value (from the f-stop)Tv = Time Value (from the shutter speed)Aperture of f/1 has an Av=0, and an exposure time of 1 second has a Tv=0 Second:EV = Sv + BvSv = Speed Value (from film speed)Bv = Brightness Value (how bright the lighting is)ASA 3 has an Sv=0, and 1 foot-Lambert of light brightness has a Bv=0 Both definitions are "equal" to each other. Wide open at slowest speed:EV = 0 + (-5) = -5Stopped down at fastest shutter speed:EV = 8 + 13 = 21. Henri Cartier-Bresson. Henri Cartier-Bresson (August 22, 1908 – August 3, 2004) was a French photographer considered to be the father of photojournalism.
He was an early adopter of 35 mm format, and the master of candid photography. He helped develop the street photography or life reportage style that was coined The Decisive Moment that has influenced generations of photographers who followed. Early life[edit] Cartier-Bresson was born in Chanteloup-en-Brie, Seine-et-Marne, France, the oldest of five children. His father was a wealthy textile manufacturer, whose Cartier-Bresson thread was a staple of French sewing kits.
His mother's family were cotton merchants and landowners from Normandy, where he spent part of his childhood. The Cartier-Bresson family lived in a bourgeois neighborhood in Paris, near Place de l'Europe. He attended École Fénelon, a Catholic school that prepared students to attend Lycée Condorcet. Studies painting[edit] Experiments with photography[edit] Affair with Caresse Crosby[edit] Light ball - Google Search. Blog / Tutorial: How To Paint A Ball Of Light. Most Insane Thing You’ll See Today: Russian Teens Capture Death-Defying Images Climbing Moscow’s Tallest Structures. Have they no fear? There is a new trend among the young and brave in Russia called "Skywalking," where groups of teens are climbing to the top of towering structures and buildings to capture heart-racing images from above. Two such daredevils are Vitaly Raskalov and Alexander Remnov, who have created a portfolio of photographs from their vertical ventures. These two men have scaled some of Moscow's greatest heights, from bridges and water towers to skyscrapers, posing in nail-biting, dangerous positions.
Oh, did we mention they do it all without any safety equipment? Add To Collection Save this image to a collection While Raskalov and Remnov may be conquering perilous feats, they are also carving out a photographic niche all their own. Photos: Vitaly Raskalov and Alexander Remnov [via daily mail] Worm’s Eye View Photographs Show Hong Kong Like You’ve Never Seen It Before — Or Maybe You Have. By now, thanks to the Internet, you've likely seen a few photographs taken by fearless, typically Eastern European youth dangling from the tops of skyscrapers to snap sweaty-palm-inducing aerial views of the street.
These thrilling images capture what might be the 21st-century iteration of the sublime, a visual that makes one simultaneously recoil in fear and pine for more. Part of their appeal stems from the fact that only a rare few have experienced looking down at the world from such death-defying heights; the photographs thus document a highly unusual relationship with the city and its architecture. Photographer Romain Jacquet-Lagreze has remarkably managed to capture a similar sense of awe in his photographs of Hong Kong by manipulating a perspective that we are all familiar with: looking up from the ground. . Jacquet-Lagreze's "Vertical Horizon" series is a photo essay—and book—exploring the rapid vertical expansion of one of the densest cities in the world.
The Candid Frame: A Photography Podcast.