
	Where results make sense

Topic: Light meter

Related Topics

Exposure value

Photoresistor

Camera

Infrared astronomy

Infrared

Infrared spectroscopy

Cadmium sulfide

Upper Egypt

List of advertising slogans

In the News (Fri 4 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Light Meter and Digital Light Meter Products from Digital Meters.com
		Complete range of light meter products including digital light meter, datalogger light meter are supplied by leading manufacturers and are available to buy online at highly competitive pricing.
		The DLM-530 Digital Light Meter is a precise, easy to use digital light meter ideal for measuring light levels applied to safety regulations, work areas and security lighting.
		The DLM-531 Digital Light Meter is a precise, easy to use digital light meter ideal for measuring light levels applied to safety regulations, work areas and security lighting.
	www.digital-meters.com /Light_Meter-p-1-c-256.html (309 words)

	Forums - Traditional Photography - light meter \| iStockphoto.com
		Not all cameras have spot metering so the only way to get a very accurate reading of the subject itself is to use a light meter right at the subject.
		The metering in the camera is not always totally accurate, since it measures reflected light, which in turn depends on the subject brightness.
		The meter you are refering to, an incedence meter, the one you hold just in front of the subject, measures the light falling on the subject, rather than the light reflected back.
	www.istockphoto.com /forum_messages.php?threadid=20282&page=1 (626 words)

	ACE Camera Photography Magazine, Using a Light Meter and an 18% Gray Card for Better Photography
		There are also handheld reflected light meters to determine exposure settings for cameras which lack a built-in meter, and spot meters measure the light reflecting off a very small part of the scene.
		Both reflected and incident light meters are calibrated to measure the light in a scene and produce a medium gray tone, the same value which is represented by the gray card.
		The reflected light meter in your camera works well in most picture taking situations but it can be fooled when either the subject or the background is unusually dark or light.
	www.acecam.com /magazine/gray-card.html (914 words)

	Light Meters \|\| Digital Light Meter with NIST Certificate, Extech Light Meter
		Our hand-held light meters read the intensity of light falling on the subject and measurements are taken from the subject position.
		Because of this, incident meters give the most accurate exposure for the majority of situations and subjects.
		Our compact and rugged light meters are designed for use in work places, labs, schools, environmental studies, optics, real estate inspections, and much more.
	www.lightmetersnet.com (176 words)

	Turbidity Meters: TF16-N Dual-Beam Scattered Light Turbidity Meter .:optek :.
		The TF16-N uses light in the near infrared (NIR) range from 730 to 970 nm.
		Light scattered from particles (trace suspended solids, undissolved liquids or gas bubbles) in the medium is detected by eight hermetically-sealed silicon photo diodes at an angle of 11°.
		The TF16-N turbidity meter is available with a broad variety of line sizes, process connections and wetted materials and can be adapted easily to the process.
	www.optek.com /Product_Detail.asp?ProductID=10 (226 words)

	Photography: light meter
		Window light can be very flattering on your subject, but as you suggested, it is not always easy to work with.
		An incident meter reads the light that falls on the subject (normally you read at the subject and aim the dome toward the camera), as opposed to a reflective ready, like those built into cameras that reads the like that reflects off the subject from the camera position.
		Now, with side light, if you read the full light that falls on the subject by aiming it toward the window you probably will get under exposures, because it is not taking into account the shadow side that is seen from the camera.
	en.allexperts.com /q/Photography-694/light-meter.htm (584 words)

	Light Meter 101
		While light meters are not normally used to set exposures when shooting on video, many DPs will still use them to calculate lighting ratios.
		Before using the light meter, the cinematographer must enter the ASA of the filmstock which he/she is using and enter that into the light meter.
		After the ASA is entered and the cinematographer measures the brightness of the light is with the light meter, the meter will display the recommended exposure in the form of an F-stop.
	www.b-independent.com /production/lightmeter101.htm (489 words)

	Common Light Measurement Terms (Site not responding. Last check: )
		One candela is defined as the luminous intensity of 1/600,000 square meter of projected area of a flbody radiator operating at the temperature of solidification of platinum under pressure of 101,325 Newtons per square meter.
		A footcandle is defined as the amount of light received by 1 square foot of a surface that is 1 foot from a point source of light equivalent to one candle of a certain type.
		The spherical energy or surrounding light output is not captured by or reflected back to the surface of the footcandle light meter.
	www.led.net /pages/tech4.htm (891 words)

	Light Meter
		On Bolex Reflex cameras the Reflex viewing action is achieved by diverting 20% of the light incident on the lens to the viewfinder and the remaining 80% to the film by the use of a beam splitting prism inserted between the lens and the film.
		When using any normal light meter with a Bolex Reflex camera you always have to make adjustments to the readings after you have taken them so as to compensate for the difference in light reaching the film due to the beam splitting prism being in place.
		As can be seen from this picture the face of the light meter where the needle and all the controls are is designed to face away from the right side of the camera.
	www.bolexequipment.com /LightMeter.htm (352 words)

	Light meters
		However, despite its flaws reflective metering is the metering type built into all current cameras as it is the only feasible option for metering at a distance.
		It divides the scene into 5 ~ 45 areas, meters each one independently, and using a computerized algorithm tries to determine the appropriate exposure value (guessing that areas in the top left and right quadrants of the photo, for example, are the sky or that the central area is the main subject).
		Unlike the reflective metering, which you point at the subject, with incident metering you must stand in front of the subject and point the white dome towards where the camera will be.
	www.photoethnography.com /ClassicCameras/lightmeters.html (5298 words)

	Moisture and light meter from Outsidepride.
		It does not require batteries.There are two meter scales displayed on the dial.The top scale is numbered from 1 (Dry) to 10 (Wet).This is the moisture reading scale.The bottom scale is lettered from A (Low) to H (High).This is the light reading scale, indicating the minimum amount of light the plant should receive.
		Hold the meter so the narrow, purple, rectangular âwindowâ on the top of the meter case is in the same position as the surface of the leaves at the top of the plant.
		If you are growing under artificial light, you need to move the plant closer to the light source, or intensify the light source.
	www.outsidepride.com /store/catalog/Moisture-Light-Meter-p-17834.html (594 words)

	Quantum PAR Light Measurement Instruments from Spectrum Technologies, Inc.
		Light quantity refers to the intensity or concentration of sunlight.
		Light duration or photoperiod refers to the amount of time that a plant is exposed to sunlight.
		This meter measures the UV radiation between 250 and 400 nanometers, and is measured in µmol m-2 s-1 (micromoles of photons per square meter second).
	www.specmeters.com /Light_Meters (194 words)

	Light Meters: The 545 Light Meter and Datalogger
		The 545 Light Meter and Datalogger is ideal for fast, easy, and nondisruptive measurement and documentation of light quality in the workplace, hospitals, offices, schools, and homes.
		A light meter is sometimes referred to as a lux meter.
		One footcandle is equal to the total intensity of light that falls on a one square foot surface that is one foot away from the point source of the light.
	www.skcinc.com /prod/751-545.asp (582 words)

	In-Camera vs. Handheld Light Meters
		This spot meter will allow you to tell the camera to ignore the background readings and worry only about what is in the center circle (bracket in some cameras) of the viewfinder.
		One last area of concern with the in-camera meters is that they meter the light being reflected by your subject, not the light falling on it.
		Reflective meters are good with the old manual cameras that work great but their internal meter quit and is not repairable.
	www.vividlight.com /articles/512.htm (1212 words)

	Accurate Exposure with Your Meter
		To use an incident-light meter, on the other hand, you usually position the meter as near the subject as possible, in the same light that is illuminating the subject, and aim the meter back at the camera (unless the meter instruction book recommends a different technique).
		A reflected-light meter reading is influenced by both how much light there is in the scene and how reflective the subject is. The meter will indicate less exposure for a subject that reflects little light, even if the two subject are in the same scene and in the same light.
		As with a meter reading, the exposure is adjusted for changes in the lighting level, the direction of the light and the reflectivity of the light, and the reflectivity of the subject.
	www.kodak.com /cluster/global/en/consumer/products/techInfo/af9/index.shtml (4904 words)

	Luminous Landscape Forum -> Which light meter would best suit landscapes?
		An indicent-light meter would get the overall scene exposed at the zone 5 level, but that leaves the exposure of the interesting things in the shot a little more to chance than I like.
		My digital meter automatically lights up when it gets dark, but it's not that big a deal: I go to the charts when it's too dark to read the display unlit.
		A spot meter used properly is the best tool for the landscape photographer while incident meters can be useful for certain situations where you are closer to your subject.
	www.luminous-landscape.com /forum/index.php?showtopic=143&hl= (1712 words)

	Camera Light Meter Reading - Digital Photography Tips
		This is the type of light reading taken with an in camera light meter or a hand held meter which is pointed toward the subject.
		If metering a tree, aim your meter such that you read off half sun and half shadow on the tree trunk, then if need be, move around the tree to your chosen photo spot to capture the image.
		When photographing indoors by window light, be sure to meter for the average of the subtle difference between light and shadow.
	www.picturecorrect.com /articles/camera_light_meter_reading_tips.htm (637 words)

	GLWI \| Let's Go on a Cruise \| Underwater Light Meter
		A underwater light meter is used to measure how much visible light is penetrating to various depths.
		Matching light measurements are taken simultaneously from another light sensor mounted on the ship's railing (below) to correct for varying incomming light levels due to changing atmospheric conditions, for example, passing clouds.
		In addition, based on the direction of the sunlight, the port or starboard side is chosen to minimize the effects of the boat's shadow in the water.
	www.glwi.uwm.edu /education/outreach/cruise/lightmeter.php (98 words)

	TheValue of a Good Light Meter
		The idea is to measure light in the way we perceive it, by eliminating those frequencies of light to which our eyes are blind (like ultraviolet or infrared), and replicating the way our eyes perceive the intensities of visible light colors.
		This is because the deluxe M-H lamp emits violet, ultraviolet, and infrared colors of light the CIE color-corrected meter can't measure (and to which the human eye isn't sensitive).
		Using a light meter that is color-corrected and calibrated to measure the colors and anticipated levels of light is best.
	ecmweb.com /mag/electric_thevalue_good_light (1148 words)

	Flashlight Reviews and LED Modifications
		It was removed simply because it is very difficult to align the light with the light sensor so that the distance between the two is exactly 1 meter.
		I would expect that a consumer would buy a light which has output that matches their needs and when it drops below 50% of that output the light is no longer meeting their original needs and the batteries will have to be replaced.
		For unregulated lights it marks the point when output is in a significant decline phase and the drop in output is very noticeable.
	flashlightreviews.com /features/runtime_explained.htm (917 words)

	How To Use The Light Meter (Site not responding. Last check: )
		Note: Be careful not to stand between the light source and the meter, so as to throw a shadow across the Lumisphere.
		When the needle lock button is released, the meter needle becomes fixed at the deflected position.
		Note: If the location is excessively bright and the meter needle deflects beyond the scale, insert the High slide and repeat steps 4 and 5.
	www.rit.edu /~crbpph/classes/meteruse.html (210 words)

	Video University: Video University Forums: Digital Photography for Videographers: Light Meter Question
		Do light meter tests with it set to 1/60 shutter speed, and then cycle through the avilable ISO settings until it matches the iris setting on your camera with the correctly exposed shot
		Standard light meters are set up to tell you stuff you need to know for still photography.
		There ARE some light meters designed for video, which will give you color temperatures, but they are VERY expensive.
	www.videouniversity.com /forum/Video_University_Forums_C1/Digital_Photography_for_Videographers_F18/Light_Meter_Question_P158874 (614 words)

	Light Meter
		A light meter or lux meter is a device used to measure the intensity of light.
		A light meter is also used in illumination, whether as a part of a larger light regulation system or just as a handheld device used to check whether light levels meet specified criteria.
		AEMC CA813 Lightmeter - Light Meter is a portable, easy-to-use instrument that features optical sensors that are designed to match the response of the human eye, making them ideal instruments for workspace analysis and planning.
	www.valuetesters.com /Light-Meter.php (448 words)

	Rock Climbing Forums: Climbing Disciplines: Climbing Photography: usnig the built in light meter
		if you have a spot meter use that to meter on almost anything that's in the same light as what you're trying to shoot that isn't snow.
		the light reflecting off the snow is very bright and because of that your camera wants to close the apature or use a fast shutter speed to compensate.
		the rest of your scene that the flash dose not cover may or may not be under exposed depending on the difference in stops between the light of the flash and the natural light in the background.
	www.rockclimbing.com /post/965755 (1920 words)

	Classic Cameras (pre-1970) Forum: Antique light meter, worth using? - photo.net
		As long as it is responsive to light old selenium style meters like the one that you have can be handy.
		There is also a second method on one of the old meter websites that involves pointing the meter at the north sky and calibrating to an EV reading.
		But they are about the only old light meters that seem to continue to work.
	www.photo.net /bboard/q-and-a-fetch-msg?msg_id=00AvPG&unified_p=1 (786 words)

	Filter, Bags, Tripods and Accessories Forum: Light meter for AIS lens? - photo.net
		I wasn't aware of the camera's lack of light metering capability on AIS lens before changing from a manual camera to an auto camera.
		Without TTL metering you lose a lot of the things that make the F80 interesting, and it doesn't sound like you're about to change your old lenses anytime soon.
		Built in meters have not replaced hand held meters rather both are used side by side by knowledgeable photographers.
	www.photo.net /bboard/q-and-a-fetch-msg?msg_id=006d6Q&tag= (532 words)

	Light Meters, Digital Lux and Fc Meters, Light Intensity Meters
		We carry a wide range of light meters from basic models that meet the requirements of a limited budget to models with a wide measuring range that work in more demanding applications.
		Either unit defines the amount of light radiating from the source or can be used to measure the amount of light energy illuminating an object or field.
		The YK-10LX digital light meter is designed to measure a wide range of lighting types.
	www.calright.com /_coreModules/common/categoryDetail.aspx?entityType=6&categoryID=43 (446 words)

Try your search on: Qwika (all wikis)