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Topic: Exposure (photography)

	Exposure - Wikipedia, the free encyclopedia
		Acute exposure, the exposure to a toxic substance which may result in harm or death
		Exposure (photography), the total amount of light allowed to fall on the sensor during the taking of a photograph
		Multiple exposure, an exposure in which the sensitivity to light is reduced and then increased at least once during the total exposure time
	en.wikipedia.org /wiki/Exposure (379 words)

	Exposure (photography) - Wikipedia, the free encyclopedia
		In photography, exposure is the total amount of light allowed to fall on the sensor (photographic film or CCD) during the process of taking a photograph.
		The "correct" exposure for a photograph is determined by the sensitivity of the sensor used.
		An approximately correct exposure will be obtained on a sunny day using ISO 100 film, an aperture of f/16 and a shutter speed of 1/125th of a second.
	en.wikipedia.org /wiki/Exposure_(photography) (442 words)

	Encyclopedia: Photography (Site not responding. Last check: 2007-11-07)
		Photography became available for the mass-market in 1901 with the introduction of the Kodak Brownie camera, and, more importantly, with the industrialisation of film processing and printing.
		Color photography may form images as a positive transparency, intended for use in a slide projector or as color negatives, intended for use in creating positive color enlargements on specially coated paper.
		Photography (Greek "drawing with light" from photos = light, and graphis = stylus, paintbrush or graphê = representation by means of lines, drawing) is the technique of recording, by chemical or mechanical means, a permanent image on a layer of material sensitive to light exposure.
	www.nationmaster.com /encyclopedia/Photography (553 words)

	Search Results for exposure - Encyclopædia Britannica
		The correct exposure (aperture and shutter settings) can be derived from tables or calculators or by direct measurement of the subject luminance with a light meter.
		The second important condition of exposure is frequency: acute (single exposure), subchronic (repeated exposures that in total last for no more than 10 percent of the lifetime of an individual), and...
		Exposure meters, or light meters, measure the light in a scene to establish optimum camera settings for correct exposures.
	www.britannica.com /search?query=exposure&submit=Find&source=MWTEXT (301 words)

	Solar Eclipse Photography - Multiple Exposure Sequences
		Using the correct solar filters for both your own eyes and for the camera is by far the most important factor in eclipse photography, since an incorrect filter may result in permanent loss of vision for you and irrepairable damage to your camera.
		Determining the correct exposures for partial phases of the eclipse is a matter of trial and error.
		The exposures used depend on how close the Sun is to the horizon, since the intensity of the Sun near sunrise/sunset diminshes with the increased atmospheric path length.
	www.wavelengthphotography.com.au /Eclipse/EclipseDetails.asp (2241 words)

	Nude Art Photography
		Nude photography is the genre of art photography, whose subject is the representation of the naked (full nude) or partially naked (half nude) human body.
		The boundaries of nude photography, erotic photography and pornography are so undefined and continuously changing that they are always determined and defined by the subjective moral view of the individual and the generally accepted cultural confines of “customs and tradition”.
		Tasteful nude photography is often regarded as high skilled photography as besides technical knowledge and the ability to manipulate light the nude photographer also needs strong communication skills and the ability to build a positive relationship with his model.
	nude-art-photography.50webs.com (496 words)

	BoBShotS Photography - Understanding Correct Photo Exposure
		Obtaining good exposure for a photograph is achieved by allowing an appropriate amount of light to enter the camera and expose the film -- too much light and the photograph will be overexposed; too little, underexposed.
		For natural light photography the light source is typically the sun and the photographer is therefore concerned with the intensity of the sun and what may be blocking its light.
		The problem is that the camera's automatic exposure system does negate this effect with its assumption that all subjects are of medium reflectivity, resulting in incorrect exposures for all but medium brightness subjects.
	www.robert-barrett.com /photo/exposure.html (2422 words)

	Popular Photography Magazine: Using Long Shutter Speeds
		Shooting subjects in low light such as moonlit landscapes and dimly lit interiors by available light require exposures that are much too long for handholding your camera, but the results are worth the added effort.
		When it comes to creative long exposures, there isn't one right shutter speed for a particular effect—pictures taken at different settings can all be interesting.
		Incidentally, if you are taking a long exposure and auto headlights move into the scene, just hold your hand or a piece of cardboard in front of the lens until the intruding vehicle has passed.
	www.popphoto.com /article.asp?section_id=4&article_id=448 (472 words)

	Exposure strategies for digital cameras with manual exposure controls
		Because of the way the exposure duration is actually controlled inside film cameras, the term shutter speed is often substituted for exposure time, but to call for an exposure of 1/250 sec is clearly to specify a duration, not a speed.
		EC is particularly useful for manual bracketing and for overriding the camera's exposure theory in priority modes, where EC adjusts only the exposure setting left to the camera's control.
		Often, this is all the control you need to get the shot in your mind's eye, but higher-end digital cameras with exposure compensation and fully manual exposure allow you break the bonds of camera-imposed exposures to reach the tonality and motion control you had in mind.
	dpfwiw.com /exposure.htm (13516 words)

	* Program exposure - (Photography): Definition
		PROGRAM EXPOSURE MODE: A preset arrangement of aperture and shutter speed that is programmed into the exposure system of a camera to respond to a certain level of brightness when the camera is loaded with a certain speed of film...
		A fully automatic exposure mode that sets the camera's aperture and shutter speed often referred to on camera dials and panels as P. Program shift...
		An exposure mode on an automatic or autofocus camera that automatically sets both the aperture and the shutter speed for proper exposure.
	en.mimi.hu /photography/program_exposure.html (170 words)

	Exposure: Exposure: Glossary: Learn: Digital Photography Review
		The exposure is the amount of light received by the film or sensor and is determined by how wide you open the lens diaphragm (aperture) and by how long you keep the film or sensor exposed (shutterspeed).
		The effect an exposure has depends on the sensitivity of the film or sensor.
		For instance if you are shooting at ISO 100 with an aperture of f/8 and a shutterspeed of 1/125s, doubling the shutterspeed to 1/250 (halving the exposure time) and reducing the f-number one stop to f/5.6 (doubling the aperture) will lead to the same exposure of 13 EV.
	www.dpreview.com /learn?/Glossary/Exposure/Exposure_01.htm (415 words)

	For Photography (Site not responding. Last check: 2007-11-07)
		The disappointment many feel from their photographs when it comes to exposure is not from detail missing in the highlights or the shadows (to be discussed in a moment), but because it does not communicate what we wanted about the scene.
		The proper exposure for an element in a scene is when detail can be seen in that element, detail such as leaves, ruffles in a cloud.
		The exposure range is generally within the 2 1/2 to 3 stops without having to mess with flash or filters.
	www.forphotography.com /how-tos/perfect_exposure.shtml (1649 words)

	Dan Heller's Tutorial Series: Extended Exposure Photography (Site not responding. Last check: 2007-11-07)
		Shorter-term exposures may be up to 1/3 of a second, and are often used to capture motion blur, as illustrated by the photo of the Noddy Tern in flight.
		The challenge for obtaining long exposures in the daytime is reducing the amount of light through the lens.
		Technically, there is no "accurate" way to meter light for night photography for any given scene because light meters can give dramatically different values in very low light ranges, and different parts of the scene can be very bright or very dark, simply due to the nature of night.
	www.danheller.com /tech-longexp.html (3325 words)

	Photographic Science: Exposure
		In effect, under unusual conditions or for an unusual exposure technique, what is to be rendered the equivalent of 18% gray on the film image is shifted to something higher or lower in luminance than the overall subject average.
		In calculating camera exposure settings, a change of one EV in the settings equals a one stop change in exposure and this is done by changing the shutter speed or the aperture by one stop.
		Sometimes an exposure must be estimated due to a camera not having a built-in meter, not having a hand-held meter, or a meter malfunction (e.g., dead batteries).
	johnlind.tripod.com /science/scienceexposure.html (6741 words)

	Exposure (photography): Definition and Links by Encyclopedian.com - All about Exposure (photography) (Site not responding. Last check: 2007-11-07)
		Exposure (photography): Definition and Links by Encyclopedian.com - All about Exposure (photography)
		Film sensitivity is referred to as 'speed' and is measured as an ISO rating[?].
		Today, most cameras automatically determine the correct exposure at the time of taking a photograph by using a built-in light meter.
	www.encyclopedian.com /ex/Exposure-(photography).html (184 words)

	ChromaZone Exposure System - Zone System for Color Photography and Digital Photography - Creative Exposure Control
		Numerous examples guide you step-by-step through the process of achieving the exposure you want – in any situation from dawn to sunset – and in varying types of terrain from dimly lit forests or deep slot canyons to bright sand and snow.
		Exposure control is one of the most important creative controls at your disposal.
		Both amateurs and professionals are using this method with superb results in all their photography – from wildlife to wild scenery.
	www.photonaturalist.com /chromazone/intro.html (1436 words)

	Composition and Exposure Photography Books UK
		More than seventy techniques, both popular and less-familiar approaches, are covered in detail, including advanced exposure, bounced flash and candlelight, infrared, multiple images, soft-focus effects, unusual vantage points, zooming, and other carefully chosen ways to enhance photographs.
		Explore the creative process of photography as you delve into the minds of 23 master photographers.
		This edition of Photography and the Art of Seeing is updated to include technical guidelines adapted for both digital and film photographers and includes photographs from Freeman Patterson's personal collection.
	www.jafaphotography.com /exposure_composition_books_uk.htm (780 words)

	Ultimate Exposure Computer
		Switch from automatic to manual exposure (a good idea anyway) and simply move to the next larger aperture or the next slower shutter speed (for a light object) or to the next smaller aperture or faster shutter speed (for a dark object).
		Automatic focus and exposure (especially TTL flash) are extremely useful for some specialized types of photography, such as sports or photojournalism.
		For some films, exposures involving shutter speeds in excess of several seconds may require additional exposure because the film's sensitivity decreases with continued exposure to light for long periods (this is called "reciprocity failure").
	www.fredparker.com /ultexp1.htm (5252 words)

	Exposure Explained
		A half second exposure is ONE STOP darker than a one second exposure.
		Exposure is about different combinations of shutter and f-stop settings.
		Because if the exposure is made with a wide aperture (like f2.8), then objects farther away from the subject are thrown farther out of focus.
	www.88.com /exposure/exposure.htm (470 words)

	1Ds and long exposure photography
		At a five minute exposure time, this level of clarity, noise and detail is something new.
		Using this setting, long exposure shots are saved and viewed on the LCD almost immediately after waiting for the exposure time.
		From my samples, I found this unnecessary for images up to 4-minute exposure since stuck pixels are kept to a minimum even for this duration.
	www.fredmiranda.com /1Ds_review/index_longexp.html (640 words)

	Astronomy - Astrophotography - Michael E. Bakich
		Take two exposures through the same camera and with the same film, the first a 1-second exposure at f/1.4 and the second a 128-second exposure at f/16.
		In a perfect world, both exposures would look the same; the bright and dark areas on one negative would be repeated on the other.
		where x is the exposure time in seconds, fl is the focal length in millimeters, and d is the declination of object, in degrees.
	www.astronomy.com /asy/default.aspx?c=ss&id=12 (3563 words)

	Photography Workshops and Photo Classes in the Western US & Canada that Teach the Craft of Photography (Site not responding. Last check: 2007-11-07)
		Our experience teaching beginning and advanced photo workshops and general photography classes enables us to communicate with each person at their level, and ensures that everyone will benefit by attending one of our events.
		a belief that continued supervised practice is the best learning technique enables the photography workshop to emphasize shooting in the field more than classroom discussions.
		An exposure36 Photography workshop is an intense session in the sense that you will learn more during the workshop than a whole semester of photography classes.
	www.exposure36.com (393 words)

	What Is... Correct Exposure? - Digital Photography Tutorial - Photoxels
		Obtaining correct exposure is a setting combination of aperture and shutter speed.
		To maintain correct exposure, you therefore have to double the time the shutter remains open.
		Suppose we meter a correct exposure at 1/30 sec., F8, at ISO 100.
	www.photoxels.com /tutorial_exposure.html (1896 words)

	Multiple Exposure Photography Using Filters
		After the first exposure is made, the filter is rotated so that it now covers and protects the portion of the frame that was just exposed.
		Remove the multiple exposure filter, frame your second subject in the viewfinder as desired and focus carefully.
		Re-attach your multiple exposure filter (or move your piece of cardboard) and adjust it so that it covers the area of your first exposure and leaves uncovered the portion of the frame where your second exposure should appear.
	www.middletownk12.org /north/photopg/4dmultx.htm (943 words)

	Commanding Exposure: Photography Guides
		Your camera's light meter bases all of its exposure settings on 18% gray, an "average" tone somewhere in the middle between light and darkness.
		Subjects that are lighter or darker than "average" fool your camera and ultimately lead to exposure errors that can ruin even the most well composed photograph.
		Bracketing your exposure means shooting over and under the exposure setting recommended by the camera (or the one you've set manually).
	www.outdoorphoto.com /exposure.htm (467 words)

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