TTL (Through-the-lens) metering
A camera that takes exposure reading of the light that passes through the lens.
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TTL (Through-the-lens) metering
Techniques Glossary TTL (Through-the-lens) metering
A camera that takes exposure reading of the light that passes through the lens.
Through-The-Lens Focusing Viewing a scene to be photographed through the same lens that admits light to the film. Through-the-lens viewing, as in a single-lens-reflex (SLR) camera, while focusing and composing a picture, eliminates parallax.
THROUGH-THE-LENS - Commonly abbreviated as "TTL". Refers to both exposure metering of the light passing through the lens (Through-the-lens metering, and TTL flash metering) and viewing a scene through the same lens that allows light to reach the ...
Through-the-lens viewing
SLRs see exactly what the lens does.
SLRs see the exact composition, the exact framing, the exact point-of-view, the exact perspective, and usually the exact depth-of-field.
Through-the-lens meter (TTL meter). An exposure meter built into the camera that takes light readings through the lens.
Through-the-lens (TTL) metering. Measuring exposure by a meter built into the camera body, which measures the intensity of light passing through the picture-taking lens.
Through-the-Lens Meter (TTLM)
An in-the-camera meter that can, in the case of video, adjust the iris as you shoot. It performs sophisticated readings of virtually everything except your mind. See: Automatic Exposure.
TTL (Through-The-Lens)
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.
[edit] Through-the-lens light metering
As a small matter of history, the first 35 mm camera (non-SLR) to feature through the lens light metering may have been Nikon, with a prototype rangefinder camera, the SPX.
Through-the-lens measuring techniques, especially distance measuring of autofocus systems rely on CCD components, even in analog SLRs. Light metering can also be based on a CCD as sensor.
ReferencesEdit ...
Through-the-lens - see TTL.
Thyristor flash gun - automatic flash gun which cuts off the flash when the exposure is correct. This conserves power, makes recycling quicker, and battery life longer.
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, ...
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.
Type of exposure meter built into the camera body and reading through the camera lens. May measure either at full aperture or at picture taking aperture. (refer below for more descriptions).
Through-The-Lens Focusing ...
Ikelite's remote through-the-lens slave sensor is perfect whether you're working in the high ambient light of a shallow reef or in a pitch-black cave.
Remote TTL Slave
Manufacturer - Ikelite ...
Evaluative, through-the-lens flash metering.
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Exposure Value; A number that represents available combinations of shutter speed and aperture offering the same exposure effect when scene brightness remains the same.
This metering is usually done Through-the-Lens (TTL). This works pretty good for most of the time but there're several situations where the limit of the method is exceeded.
If you have a nice bright through-the-lens optical finder, why would you want to frame your shot with the LCD screen? Well, hopefully you won't photograph by holding the camera at arms length like many snapshooters do.
Short for Evaluative Through-the-Lens Mode. By Canon developed method for flash exposure measurement and -control.
A good quick and dirty lighting technique is to use a through-the-lens (TTL) metered flash with a dedicated extension cord (Nikon SC 29 off-camera flash cord or Canon Off Camera Shoe Cord 2).
i-TTL Balanced Fill Flash Nikon's i-TTL (intelligent through-the-lens) Balanced Fill-Flash automatically balances the output of the Nikon Speedlight and the scene's ambient light. Find out more.
These four modes are all forms of through-the-lens flash metering used by Canon cameras. Older EOS film cameras support TTL and A-TTL metering only. Newer film models and almost all digital EOS cameras support E-TTL flash metering.
DSLR's offer interchangeable lens capability, true through-the-lens viewfinders, fast operation, and generally low digital noise.
- Contrast-detect through-the-lens (TTL) AF
- Auto and manual focus
- Continuous and single shot AF
- AF illuminator
- Area, Center and Multi (manual AF point selection) autofocus
- 1cm closest focus (Super macro mode, wideangle)
Shooting mode ...
Most modern SLRs have through-the-lens (TTL) metering. With TTL flash the camera calculates the exposure. This does not mean that you will always get proper exposure. Like other metering modes the camera will try to make everything as medium tone.
Most current SLR flash systems employ some form of through-the-lens (TTL) metering.
D-SLRs are the high end of digital cameras, with true reflex through-the-lens viewfinders, interchangeable lenses, good control over exposure and color, and lots of accessories.
Such a lens makes for a brighter viewfinder view and eases focusing with through-the-lens cameras.
The viewfinder on our camera is through-the-lens, so we shouldn't have a problem with parallax.
Multi-segment metering, also called evaluative, matrix or honeycomb metering, is an advanced TTL (through-the-lens) metering system that interprets simultaneous readings from multiple areas in the frame to determine the correct exposure.
On cameras that let you compose the image on the monitor, the displayed image is taken directly from the image sensor, so it is a true TTL (through-the-lens) view.
Regular through-the-lens metering will still work on all lenses. You need to find one with the right thread diameter for your lens, but if neither Nikon nor Canon has one to fit, you can always use a step-up ring.
The difference between the image seen by the viewing system and that recorded on the film. Problems occur as the subject moves closer to the taking lens when using TLR cameras. Only through-the-lens viewing systems can avoid parallax error.
(see TLR) ...
In addition, virtually all digital cameras use "TTL" (through-the-lens) light metering, so that the camera measures the reflected flash at the sensor plane and shuts off the unit when enough light has been supplied.
figure by which the exposure indicated for an average subject and/or processing should be multiplied to allow for non-average conditions. Usually applied to filters. Occasionally to lighting. Processing, etc Not normally used with through-the-lens ...
stops down to avoid losing too much quality, you can appreciate that you need very good light or a higher ISO to ensure images free of camera shake or subject movement. Any light loss is automatically accounted for by the camera's through-the-lens ...
 See also: Lens, Camera, Light, Image, Photograph
  
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