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Topic: Photographic flash

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	Flash (photo)
		A photographic flash is a device that produces a flash of light required for indoor or other low light conditions.
		The earliest flashes consisted a lump of magnesium powder that was ignited by hand.
		Todays flash units are fully electronic, and contains a Xenon gas filled tube where electricity of high voltage is discharged to generate a short flash of light.
	www.ebroadcast.com.au /lookup/encyclopedia/fl/Flash_(photo).html (169 words)

	Flash (photography) - Wikipedia, the free encyclopedia
		The earliest flashes consisted of a quantity of magnesium powder that was ignited by hand.
		An electronic flash contains a tube filled with xenon gas, where electricity of high voltage is discharged to generate an electrical arc that emits a short flash of light.
		A fill flash is a low powered flash mixed with ambient light, and is often used to illuminate shadows on the side of a subject facing the camera.
	en.wikipedia.org /wiki/Flash_(photo) (1028 words)

	The Flash Doctor - Free Flash Capacitor Maintenance Tips
		Flash Capacitors must be pampered; this is accomplished by forming the flash capacitor as much as possible.
		Flash power supplies that are not used on a daily basis, or ones that are stored for long periods of time definitely need forming.
		Electronic Flash Units that are inactive for months at a time it is advisable to form the capacitors for 6-8 hours each day over a 3 day period prior to using it on an assignment.
	www.angelfire.com /electronic2/flashdoctor/capacitor.html (408 words)

	Switch control for camera flash unit - Patent 4285589
		The electronic flash of claim 5 wherein the actuator assembly housing includes a plurality of wall portions which are complementary to respective portions of the exposure control housing forward, side and rearward walls without obstructing access to the photographic exposure cycle initiating button.
		However, electronic flash units are generally configured to be detachable from the top of the lens housing portion of the camera thereby making it inconvenient for a grip switch, which constitutes an integral part of the camera, to control the detachable electronic flash unit.
		The electronic flash switch actuator 100 of the present invention is thus desirably mounted on the camera so that the push button 112 is readily reachable by the photographer's camera-operating hand when such hand is in a normal position to operate the photographic cycle initiating button S1 of the camera.
	www.freepatentsonline.com /4285589.html (4628 words)

	High Speed Photography
		Electronic flash is now standard photographic equipment and is used not only when the available light is too weak but, with an open shutter, to arrest motion due to the shortness of the flash.
		Flash bombs are tubes containing argon with a transparent end window and a small explosive charge at the opposite end.
		For example, when photographing the action of guns and their projectiles, a pick-up to detect the initiating explosion or the projectile's shock wave can be used to trigger or start the light source and, when necessary, the shutter.
	www.rit.edu /~andpph/text-high-speed.html (5325 words)

	Photographic flash device - Patent 4276579
		The present invention relates to a photographic flash device which is an artificial light source in the case of photography and more particularly a photographic flash device capable of easily varying the flash light or beam emission angle from a flash tube.
		Accordingly, one of the objects of the present invention is to provide a photographic flash device wherein the exposable distance range may be automatically changed when the flash light emission angle is made variable so that it is not needed to obtain the allowable flash exposure distance range by the operations of other exposure data.
		1 is shown in perspective an embodiment of a photographic flash device in accordance with the present invention.
	www.freepatentsonline.com /4276579.html (1220 words)

	Adaptor for photographic flash device (Site not responding. Last check: 2007-10-21)
		In photographing with a photographic flash device, it is well known to set up an optical supplementary means such as optical panel, for instance, light converging panel, light diffusing panel, light attenuator or color balancing filter, in front of a flashing part of the flash device.
		Both sides of the body 9 of the flash device, respectively, are equipped with indent parts 11, 11' which are to be engaged in the convex parts 7, 7' on the resilient memebers 5, 5', respectively, for fixing the adaptor to the flash device body 9.
		After photographing, the adaptor 1 is easily demounted from the flash device body 9 by being pulled toward the arrow mark, thereby disengaging the convex parts 7, 7' on the resilient members 5, 5' from the indent parts 11, 11' on the body 9.
	www.sacnewsmonthly.com /invent/process_preparing_1_5-benzodiazepine-2-ones/adaptor_photographic_flash.html (1101 words)

	Scott E. Brodie, MD - Department of Ophthalmology - Mount Sinai School of Medicine
		In addition to producing flashes, the stimulator must be capable of producing a steady and even background luminance of at least 17-34 cd.m-2 (5 to 10 fL) across the full field.
		A photographer's light meter is ordinarily used in one of two basic modes: it may be pointed at the "scene" to be photographed, in which case it measures reflected light, the (steady-state) "luminance" of the scene (SI units: cd/m
		The spectral sensitivity curve for photographic meters is intended to reproduce V-lambda, the standard spectral sensitivity curve for human photopic vision, but may be modified by the manufacturers to more closely resemble the response of photographic emulsions.
	www.mssm.edu /faculty/brodis01/profile_files/flash_photometry.html (1010 words)

	Flash synchronization - Wikipedia, the free encyclopedia
		In a camera, flash synchronization is required for the firing of a photographic flash to coincide with the shutter admitting light to the photographic film.
		Note that due to their construction, focal plane shutters as used on most SLRs will only allow xenon flash units to be used at shutter speeds where the entire film is open at once, typically at shutter speeds of 1/60 or slower, but some modern cameras may have an X-sync speed as high as 1/500.
		The downside is that the flash is of less effective intensity since the individual bursts are lower powered than the normal capability of the flash unit.
	en.wikipedia.org /wiki/Flash_synchronization (446 words)

	The World Market for Photographic Cameras Excluding Cinematographic Cameras; Photographic Flash Apparatus and Bulbs ...
		I have developed a methodology, based on macroeconomic and trade models, to estimate the market for photographic cameras excluding cinematographic cameras; photographic flash apparatus and bulbs excluding electric filament, discharge, or arc lamps; and associated parts and accessories for those countries serving the world market via exports or supplying from various countries via imports.
		Chapter 4 does the same, but for imports of photographic cameras excluding cinematographic cameras; photographic flash apparatus and bulbs excluding electric filament, discharge, or arc lamps; and associated parts and accessories for all countries in the world.
		The SITC code that defined "photographic cameras excluding cinematographic cameras; photographic flash apparatus and bulbs excluding electric filament, discharge, or arc lamps; and associated parts and accessories" is 8811.
	www.marketresearch.com /researchindex/915182.html (957 words)

	Flash Cards
		Flash cards are a hit with most children and are very effective at keeping kids interested in learning.
		We offer flash cards for addition, division, multiplication, subtraction, the alphabet, basic pictures, basic sight words, everyday words, money, numbers, sign language, time, and U.S. states and capitals.
		Fun activities like photographic learning cards teach children about expressing emotions and understanding manners, while roll and learn cube games can help teach children beginning math skills, for example.
	www.tttools.com /Flash-Cards_c_164-2-0.html (207 words)

	The Flash Doctor - Photographic Glossay
		ProDaylight, which is Profoto's for the lamp head that uses HMI and MSR lamps, is meant to imply that this continuous source of light maintains largely the same temperature as given off by the flash, or by real daylight (around 6000 degrees Kelvin).
		In order to cope with the heat of repeated flashes utilizing high energy, it is necessary to make the material in a flash-tube out of quartz.
		For practical uses, however, there are simple temperature meters that measure the spectrum of the light at three points, to give an approximate evaluation.
	www.angelfire.com /electronic2/flashdoctor/glossary.html (2209 words)

	We have ignition!
		When exposed to a conventional photographic flash, the nanotubes emit a loud pop and then ignite.
		What surprised the researchers even more was the fact that the nanotubes then spontaneously ignited and burned upon photographic flash exposure.
		The discovery was initially noted by Andres de la Guardia while he took flash photographs of the nanotubes.
	www.eurekalert.org /pub_releases/2002-04/rpi-whi042402.php (660 words)

	Dual Shoe flash advanced photographic lighting (Site not responding. Last check: 2007-10-21)
		Rochester Photographer Neil Cowley is available for corporate or editorial assignment In Western New York, Buffalo, Syracuse, Albany, Adirondacks, Lake George, 1000 Islands, Finger Lakes, Niagara Falls, Lake Erie and world wide for freelance media photography contracts.
		The on camera flash left the hand in the center of the green ring a little too hot, which I dodged down a little.
		As I mentioned I generally use a greater output for the flash in my left hand than the flash on the camera so it has the effect of a larger source than it truely is.
	neilcowley.com /light/two_flash.html (1798 words)

	A and N Photography: Flash sync voltage on the hotshoe x-sync connector
		Below are images of the flash unit under test, the test probes and the actual measurement of the X-sync voltage displayed on the Fluke 77 Multimeter.
		The X-sync voltage on the Vivitar 285HV flash is low enough for Nikon cameras, based on the statement in their user manuals, but not for some Canon cameras which claim a maximum voltage of 6V on their hotshoe connectors.
		Measuring this flash unit was scary because there is no external connecting cable available so the meter probes had to be stuffed into the hotshoe mechanical assembly and held while the Kodak Easyshare CX7530 fired off the self-timer.
	aaronlinsdau.com /gear/articles/flashvoltage.html (941 words)

	Dedicated photographic flash system for varying flash spread based upon camera-to-subject distance - US Patent 5126778 (Site not responding. Last check: 2007-10-21)
		A dedicated electronic flash unit for automatically varying flash spread based on camera-to-subject distance.
		When a photograph is to be taken, the diffusion plates are pivoted by the actuator to one of three different positions.
		Other embodiments utilize a sectioned cylindrical lens-diffuser which is rotated into a proper position or a single diffuser that is moved towards or away from the flash tube to vary the flash angle-of-illumination with changes in camera-to-subject distance.
	www.patentstorm.us /patents/5126778.html (286 words)

	Photographic equipment: inventory of collection at SW Studies Center
		George Snyder was the principal and (when it became a junior college) dean of Fort Lewis while it was in transition from high school to college, serving as the chief administrator from 1911 until his death in 1934.
		With cold clip #193 (instructions are on it)(a), Model 268 flash (b)(uses clear M3 bulbs), and nine Westinghouse M3B flash bulbs (9 lavender hued flash bulbs filled with combustible material resembling finely divided steel wool) in original carton that held 12) in original box (c), and instructions booklet and related papers (d).
		Two glass lantern slides were separated out into the general photograph collection: b/w winter forest snow scene (h) and a round color nature scene of a bird on a log (i).
	swcenter.fortlewis.edu /inventory/photoeqp.htm (6084 words)

	Understanding professional strobes: the britek PS-300H professional studio flash at Photographer's SupplyStation your ...
		With strobes, nothing is shining in their eyes, and the flash is too short to cause any of this discomfort to our beloved subjects (until AFTER the flash, when they might be chasing all those little light blips around the room:).
		Sometimes a full power flash is too powerful for the effect we're after; other times we may want to reduce the illumination to create a different mood.
		In people pictures, for a head shot (that's what photographers call a picture of a person's face, often the face and shoulders), we often want part of the face highlighted, and the other part of the face in a light to medium shadow.
	myphotohome.com /strobes.html (6722 words)

	Laser or Alternate Light Source Photography
		However, with a slave flash, the distance can be increased to 18, 25, even 40 feet...depending on the flash used as a slave flash.
		A slave flash is ANY photographic flash attached to a slave unit.
		Again referring to the owners manual of this flash, the manual states the 5.6 f-stop is compatible to the "red" setting on the flash.
	www.feinc.net /slave-f.htm (599 words)

	LumiQuest® Photographic Accessories \| Flash…The MOST Available Light
		FLASH …THE MOST AVAILABLE LIGHT contains over 90 photographs, charts and illustrations to explain and demonstrate how your flash is an indispensable tool with a variety of applications.
		This book is the result of several decades of flash photography, designing the LumiQuest line of photo accessories, and thousands of conversations with both novice and experienced photographers.
		Many of the techniques discussed in the book were, of course, originally developed using traditional film cameras but are equally applicable to digital imaging...light is light and shadows are shadows whether you are shooting with digital or film.
	www.lumiquest.com /ftmal.htm (328 words)

	Intermediate Photography Equipment List
		Photographic Flash Slave -- to fit your flash unit.
		Flash Meter that will measure for both ambient and electronic flash exposures.
		Mounting Brackets -- to attach your strobe to the umbrella and the umbrella and the strobe to the stand.
	www.wku.edu /Dept/Academic/AHSS/Journalism/Photo/intermediate_equipment.html (637 words)

	LumiQuest® Photographic Accessories
		A photographic flash is a small, high intensity source of light which produces generally harsh, unattractive shadows.
		Our ProMax System is a six-piece light modification kit that allows the photographer to deal with a variety of lighting situations on location.
		Flash Accessories Tutorial for a basic lesson on light and shadow modification.
	www.lumiquest.com (322 words)

	Initial Flash: The First Steps / Site Design and Graphics / WebDeveloper.com ®
		The fact that Flash uses a vector based system is quite important for its portability and speed.
		Flash can deal with this and will include a bitmap image if you so wish.
		An entire Flash presentation has the potential to be shown at any screen resolution at full size since vector co-ordinates can easily be multiplied or divided.
	www.webdeveloper.com /design/design_flash_tutorial_part1.html (607 words)

	Olympus EVOLT E-300 Review: 18. Photographic tests: Digital Photography Review
		And on the E-300 it does seem pretty effective, as you can see from the image on the left hot pixel noise is sprinkled liberally all over the image without NR, switched on it's all gone and there are no fl pit NR artifacts either.
		In some circumstances the E-300's flash appeared to work perfectly well (see color patches sample below), however we did find it to be perhaps affected by the same metering problem as normal non-flash exposures (see the bottom of this page).
		As you can see the very first shot, no flash exposure compensation is quite under-exposed, as we add a little flash exposure compensation things improve slightly but it's clear that the actual flash power should have been between 1.0 and 1.7 EV more than was metered.
	www.dpreview.com /reviews/olympuse300/page18.asp (893 words)

	Wimberley Flash Brackets offered by L.L. Rue (Site not responding. Last check: 2007-10-21)
		This flash bracket system solves many problems and is designed to integrate with the Arca-Swiss style quick release system.
		This allows you to extend the height of the flash bracket and attaches to the vertical arm of the flash bracket.
		Consists of modules 1, 2, 3, and 4, which allows you to do everything that Combos 1 and 2 allow, and also allows Module 4 to be used as an extension to position your strobe higher or off-center from your telephoto.
	www.rue.com /flashbrackets.html (309 words)

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