Metering system
A function for measuring the brightness (light). You may wish to select a different metering system, depending on the size of the area in which the light is measured.
MF
Short for Manual Focus.
Flash metering systems used by Canon EOS.
Electronic flash has come a long way since Harold "Doc" Edgerton, an American researcher and inventor, made modern electronic flash photography a reality in 1931.
Matrix Metering system
An exposure metering system using a multi-segment sensor and computer. Available in some Nikon SLRs.
Camera Metering System
The meter gives us information on the overall quantity of light.
Metering systems work by measuring the amount of brightness within a scenery or object, then sets the exposure accordingly. However, the camera can often get the exposure wrong if the onboard metering mode has been set incorrectly.
Metering system that evaluates the importance on multiple portions of the frame. The software in the camera then determines which portion to base exposure calculation on.
MS ...
A metering system that uses several sensors to take readings from various sections around the image and calculates an exposure based on these values.
The metering system, with a few clever refinements, measures the light in a scene and tries to take an average of all the tones.
Camera metering systems are great. No doubt about it. But there are times when you might want to expand your metering options, such as for flash or strobe studio and outdoor photography, ...
Multi-zone metering systems are very easy to use. In primitive cases just POINT & SHOOT. Manual compensation isn't very reliable with difficult scenes because you simply don't know exactly how the camera calculates the settings.
TTL refers to a metering system that determines the proper exposure based on measuring the light that strikes the imaging sensor (or film-plane) after passing through the camera's lens.
A camera exposure metering system which "reads" an area around the centre of the image.
CF ...
The D50 uses a new metering system based on a 420 segment sensor, this appears to be tuned to deliver brighter images with more punch (where as the D100/D70/D70s are set up to avoid over-exposure).
Camera makers extol metering systems that deliver perfect exposure every time, but here's the reality: Often there is no one correct exposure. That's why Las Vegas shooter David Thompson makes a habit of bracketing all the important pictures he takes.
Remember, all metering systems want to do one thing and that is to make an average middletone result. Make necessary adjustments for lighter or darker than middletone subjects. Pay close attention to the direction of the light.
However, certain dark blue, red, and orange filters may give faulty readings if used with TTL metering systems because the meter reads 18 percent gray. The camera light meter may not be sensitive to the color of light passed by the filter. 4.
A new 77-segment metering system quickly and accurately determines exposure for even the most complex and dynamic lighting situations.
Matrix and evaluative metering systems are very user friendly and do a great job. But camera manufacturers have built in proof they’re not infallible. The proof lies in the exposure compensation button.
However, there are still situations where even the best metering system will struggle. Realizing when to override the camera's setting is the key to successful images.
If we understand that our cameras’ metering systems see in black and white, not colour, then we see how useful this visualisation is. All modern cameras use 18% grey midtone as the starting point for deciding upon exposure.
Term used to describe how a flashgun works in conjunction with a camera's metering system to deliver correct exposures automatically.
Depth Of Field ...
Understand what your camera's light metering system will do - or meter separately and use manual settings on your camera.
Averaging, center weighted and "matrix" type metering systems will take a bit of experimenting to figure out just what the meter is "seeing".
a metering that can handles from EV1-EV21 means a metering system that can measure brightness level from just above the light level of a candle light to a brightly sunlight scene on a beach.
The center-weighted mode is similar to the zonal metering system in that it takes reading from multiple area of the frame but it differs from the multi-segmented mode in that it places emphasis on the readings from the center of the frame.
Even today’s sophisticated DSLR metering systems can be tricked by certain situations. When exposing a jet against a clear blue summer sky, automatic camera settings will often properly expose the sky, and leave you with an underexposed plane.
Back in the days when dinosaurs roamed the earth and we walked to school barefoot in the snow--before through-the-lens metering systems, ...
This was used on all early SLR TTL systems; the alternative - metering with the lens fully open requires the metering system to "know" the taking aperture and compensate for it when determining the shutter speed.
Camera manufacturers use different metering systems and exposure algorithms in their DSLRs, with more expensive models offering increasing sophistication. You may find that you need very little or no exposure compensation at all for a snow scene.
Exposure Metering Patterns: Many SLRs today have very sophisticated metering systems that analyze a scene and make calculations based on algorithms that have been pre-programmed into the camera.
Canon digital cameras use a center weighted metering system, which means that the camera measure the exposure from a small area in the center of the image.
A camera metering system which concentrates the light reading mostly to the central portion of the viewfinder and feathering out to the edges.
Most cameras have a "forced flash" setting that compels the camera's flash to burst even though the camera's automatic light metering system wants to suppress that flash.
I wouldn't look at anything without a viewfinder, and would be leery of overly automatic metering systems.
Some digital cameras feature an exposure lock as part of the autoexposure metering system, which is extremely useful for scenes with a high contrast between the light and dark areas.
There are no hard rules here and the speed you shoot it at depends on your taste and yout metering system. Experiment and see what you like best. ISO 40/50 can be a bit slow for wildlife work, so many people use a faster ISO 100 film.
Autoexposure, technically known as semi-automatic exposure, where the camera's metering system chooses either the shutter speed or the aperture, was finally introduced by the Savoyflex and popularized by Konishiroku in the 1965 Konica Auto-Reflex.
Advanced camera exposure metering system. Nikons with this metering mode use a multi segment sensor a computer and an extensive scene data bank. A great method to insure a high success probability to correct exposure under most lighting situations.
TTL (through-the-lens) is a light metering system in which the light meter takes a reading through the lens (just as the name says) in order to provide a more accurate exposure value, ...
Most, if not all, modern 35mm/APS SLR cameras come with some form of built in light metering system. The finer points of how specific lightmeters actually measure light may vary but the basic operation is the same for most built in systems.
When shooting against a bright sky like this you need to pay careful attention to the exposure, the automatic metering system will render the face too dark so you need to compensate for this.
Abbreviation of "through-the-lens" as referring to a metering system in which a suitable light-sensitive mechanism within the camera body measures exposure from image light passing through the lens.
Automatic Exposure (AE) With automatic exposure (AE) the camera's computer and metering system automatically select the aperture and shutter speed for a correct exposure.
TTL (through-the-lens): Refers to a metering system that utilizes a light-sensitive mechanism within the camera body to measure exposure from image light passing through the lens.
iESP - Olympus' exposure metering system.
iLink - Sony's term for IEE-1394 FireWire data port found on Sony camcorders.
Image Processing - Capturing and manipulating images in order to enhance or extract information.
Maybe there's a bright and a dark area in the photograph. Maybe the lighting is playing havoc with your on-camera metering system. Should you depend on your metering system or shoot manual? This is a good time to use bracketing.
Automatic Exposure Camera: A camera with a built-in metering system the automatically adjusts the lens opening (aperture), shutter speed, or both for proper exposure.
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Tip 10: Use Print Film
Point-and-shoot cameras don't have advanced metering systems and need the exposure latitude of print film. Shooting slides with a point-and-shoot will be an exercise in frustration.
The polarized output of a linear polarizer can play havoc with this splitter and thus the camera's metering system.
Program exposure - An automatic camera setting where the metering system selectsand appropriate aperture setting and shutter speed to get the best performance out of the lens.
Mainly for fast auto focus and film advance motors, advanced metering systems and backlit LCD's. Tomorrow's "analog" cameras will likely be hybrid cameras; mixing digital and analog capture technologies.
This diagram shows the approximate percentage of importance given each area of the frame by the metering system.
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There are three main types of light metering systems:
Centre weighted
Matrix ...
Aperture value (Av). AE camera metering mode by which you choose aperture, and the metering system sets shutter speed (also called aperture priority).
In manual mode the exposure dial works the other way round: you choose an aperture and shutter speed, and the metering system will set the exposure dial to tell you how light or dark the object you're pointing at is: ...
Normally done in 3 or 5 sets - metering system read-out, slightly lighter one, and slightly darker one. Some higher-end cameras have the special mode for automatic bracketing. Jump to Top Back to Previous Page
C ...
Backlight control: An exposure compensation introduced when the light is behind the subject being shot, which would otherwise fool a camera's metering system into producing a silhouette effect.
Exposure Compensation
Increase or decrease the exposure an image from the exposure automatically selected by a camera metering system (see bracketing).
When a scene is lighter or darker than middle gray you need to change the exposure to capture it the way it looks or it will be too light or dark. The reason for this is because your camera's metering system tries to make every scene have an average ...
Usually there is a way to attach an external flash to alleviate this problem. Also, some digicams use a preflash metering system which might cause your subject to be caught in the middle of an eye blink.
 See also: Meter, Metering, Camera, Exposure, Light
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