Instant Portrait Studio
Tuesday, January 1, 2013 By The Editors Ever thought of opening your own portrait studio? With a few key pieces of gear and a little space at home, you can start earning extra income photographing friends and neighbors and grow your business with referrals. You may already have a lot of the gear you'll need. BACKDROP One of the most important investments for your new portrait studio is a backdrop, but you don't have to spend a lot of money to get started. LENS Most professional portrait photographers use a moderate telephoto lens because that focal range allows them to crop out background distractions while working a comfortable distance from the subject. Add Comment
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
Zbigniew Kosc photography
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. LV is often used as a scale on a light meter; the LV must then have a factor added for the film speed to get the required EV. The Light Value System is a method of using the LV/EV on a camera, where the exposure is set by dialling the LV or EV; the camera may then have a fixed aperture/shutter combination, or possibly give the user an adjustment which moves the aperture and shutter settings together to maintain the same EV. The centre of the dial is the red window for frame counting. where Link Edit
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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). ; 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] Shutter with EV indicator, figure from US patent 2829574, Inventor: K. EV as an indicator of camera settings[edit] Table 2.
Lighting 101
(Photo by Strobist reader Sam Simon) Welcome to Lighting 101. You may not realize it yet, but you have just stepped through a door that may change your photography forever. Over the past few years, over four million people from nearly every country in the world have begun their lighting education right here. Photography is literally writing with light. You'll learn how to take the removable flash that you probably already have on the top of your camera and use it off-camera to make beautiful, more three-dimensional photos. The Good News: The Gear Doesn't Cost Much Basic lighting gear is also refreshingly inexpensive. You can even make a lot of light modifiers yourself for next to nothing. For the most part, it's the location of the light that is most important. Click on a reader's picture to learn a little more about how it was made. (Photo by Strobist reader Ken Brown) The difference between their photos and yours is that they already know how to use their flash off camera.
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. Thanks for helping me help you! 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. LV, or Light Values
