Digital Camera Glossary
[0-9] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M]
[N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]
[0-9]
35mm equivalent
35mm refers to the width of a popular traditional film format where the film is 35mm wide. Digital cameras use an image sensor instead of film and the image sensor is usually about 4 times smaller in size than the 24×36mm frame of 35mm film. To capture the same amount of scene, also called field of view, onto the smaller image sensor, a digital camera lens needs a smaller angle of view, and a shorter focal length, than the lens of a 35mm film camera. The term "35mm equivalent" is used to express the focal length of a 35mm film camera lens required to capture the same field of view as the digital camera lens. For example, a digital camera with an actual focal length of 7mm has a 35mm equivalent focal length of 28mm. The lens of a 35mm film camera would therefore need to have a focal length of 28mm to achieve same field of view as the digital camera lens.
Also see Focal Length, Angle of View, Field of View.
[A]
Add-On Lens
An additional wide angle or telephoto lens that can be attached in front of the camera’s existing lens. Add-On Lenses extend the camera’s focal length, but do not provide the same flexibility as Interchangeable Lenses.
Also called Conversion Lens.
AE
Abbreviation for Automatic Exposure.
See Automatic Exposure.
AE Lock
A feature where the camera retains or ‘locks’ an exposure setting so that the photographer can recompose the shot or take a series of shots with the same exposure settings.
AE
Abbreviation for Automatic Exposure.
AF
Abbreviation for Auto Focus.
Angle of View
The Angle of View, measured at the camera lens, determines the field of view. The wider the angle of view the larger the field of view.
Also see Field of View.
Aperture
Defines the size of the lens opening and therefore the amount of light that passes through the lens. Aperture is measured in f-stops. The lower the f-stop number the larger the opening. The variable lens opening is achieved by a device call the Iris Diaphragm.
Aperture Priority
See Automatic Exposure.
Artifacts
Unwanted image distortions caused in JPEG images by high levels of compression.
Autofocus
A camera equipped with autofocus focuses automatically on the subject before taking the picture.
See also Exposure Metering.
Automatic Exposure
A system where the camera performs exposure metering and automatically sets aperture and/or shutter speed based on the lightning conditions. Commonly abbreviated as AE.
There are three AE modes:
- Program Mode
The camera meters the lightning condition and automatically adjusts the aperture and shutter speed settings to achieve proper exposure. - Aperture Priority
A semi automatic exposure mode where the photographer selects an aperture value and the camera determines the correct shutter speed, based on the lightning conditions. - Shutter Priority
A semi automatic exposure mode where the photographer selects the shutter speed and the camera determines the correct aperture, based on the lightning conditions.
Also see: Exposure Metering.
Automatic Flash
Flash that fires automatically depending on the amount of light.
AVI
A video format commonly used on the Microsoft Windows platform. Abbreviation for Audio Video Interleaved.
Also see
Movie.
AWB
Abbreviation for Automatic White Balance. A feature that automatically adjust the white balance.
Also see White Balance.
[B]
Bracketing
See Exposure Bracketing.
Bulb Mode
Originally a long time exposure mode where the shutter stays open for as long as the shutter release button is pressed. Advanced digital cameras now offer bulb modes that can be triggered via remote control, as well as long term exposure modes where the duration can be set by the photographer, ranging from a few seconds to several minutes.
Burst Mode
Feature to automatically capture a series of images in rapid success while you keep the shutter button pressed. Burst Mode is particularly useful for fast moving objects.
Also called Continuous Frame Capture or Continuous Shooting Mode.
[C]
CCD
Charge Coupled Device. A type of image sensor commonly used in digital cameras.
Also see Image Sensor.
Center Weighted Metering
See Exposure Metering.
CF
See CompactFlash.
CMOS
Complementary Metal Oxide Semiconductor. An electronic chip that is used as an image sensor in digital cameras. The use of CMOS chips is less common than the use of CCD chips. CMOS sensors are cheaper to produce than CCD image sensors but only recently managed to match the CCD image quality.
CompactFlash
A type of removable flash memory commonly used in digital cameras as a storage medium.
CompactFlash memory is available as CF Type I and CF Type II cards. CF Type II is the second CompactFlash generation and the cards are slightly thicker.
CF Type II is also used by MicroDrives.
Also see MicroDrive, Flash Memory.
Compression
Used by digital cameras to reduce the file size of images.
Compression can be lossy or lossless.
Lossy compression is achieved by removing details from the original image data. If the level of compression is not too high the file size can be reduced greatly without a noticeable deterioration in image quality. Most consumer digital cameras use the lossy JPEG compression to store images.
Lossless compression reduces image file size without removing details but requires more time to display the image as it needs to be uncompressed first.
The TIFF file format uses lossless compression.
Also see JPEG, TIFF.
Continuous Frame Capture
See Burst Mode.
Continuous Shooting Mode
See Burst Mode.
Conversion Lens
See Add-On Lens.
[D]
Depth of Field
Defines the areas in front of and behind the subject in focus that appear in focus as well. A shallow depth of field means that everything in front of and behind the subject in focus will be blurred. A great depth of field means that the areas in front of and behind the subject in focus will appear ‘sharp’ and in focus as well.
Depth of field is influenced by the focal length, aperture setting and the distance to the subject.
Digital Camera
Unlike traditional cameras, digital cameras use an image sensor to capture a scene and store the image electronically on a storage medium, rather than on film.
See also Image Sensor.
Digital Zoom
A ‘false’ zoom where the camera enlarges the center part of an image using pixel interpolation and crops the outer areas of the image. Photographers should not use the digital zoom as it generally reduces image quality. If necessary the same effect can be achieved using a computer and image editing software afterwards, often with better results than the in-camera processing.
Also see Interpolation.
Diopter Adjustment
Adjusts the viewfinder to enable users with near or far sightedness to look through the viewfinder without wearing glasses. Useful because you can put your eye right against the viewfinder blocking out any glare from the side.
DOF
See Depth of Field.
dSLR
Digital Single Lens Reflex camera.
Also see SLR camera.
dSLR like
A digital camera that is similar to a dSLR camera in style and functionality, but doesn’t have interchangeable lenses and usually no through the lens viewfinder.
[E]
EV
Exposure Value. Aperture, shutter speed and ISO sensitivity determine the exposure. The Exposure Value is a means of expressing the exposure numerically. Exposure Values are expressed in single digit steps, e.g. 1, 2, 3, etc. An increase in EV by 1 doubles the amount of light the image sensor is exposed to. Equally, a decrease in EV by 1 halves the amount of light. The same exposure (amount of light entering through the lens) can be achieved by a variety of different aperture and shutter speed setting combinations. For example an exposure with an aperture of f/2 and a shutter speed of 0.5 seconds allows the same amount of light through the lens as an exposure with an aperture of f/2.8 and a shutter speed of 1 second. In the second exposure we have decreased the aperture by one step, but choose a slower shutter speed at the same time. Both cases have the same exposure of 3 EV.
Also see Exposure, Aperture, Shutter Speed.
EVF
Electronic Viewfinder.
See Viewfinder.
Exposure
The amount of light the camera’s image sensor is exposed to. Determined by the aperture and the shutter speed.
Exposure Bracketing
Takes a series of pictures with slightly different exposure values. Depending on the camera users will be able to select the number of exposures taken,usually between 2 and 5 photos, as well as the difference in EV that should be applied for each exposure.
Useful if you are unsure about the correct exposure setting.
Also see EV.
Exposure Compensation
Allows you to manually override the camera’s auto exposure setting in case the picture appears too dark or bright. The compensation can usually be adjusted within a certain range, e.g. from -2.0 EV to +2.0 EV and in 0.5 or 0.3 EV steps.
Also see EV.
Exposure Metering
A system that measures the amount of light falling on or being reflected of a subject to determine the correct exposure settings.
There are several types of exposure metering systems:
Center Weighted Metering
An exposure metering mode where the camera determines the correct exposure by prioritizing the center area of the frame and factoring in the surrounding areas to a lesser extent. Commonly used for portrait shots.
Matrix Metering
An exposure metering mode where a scene is divided into a number of areas and the exposure calculated for each individual area. The camera then uses the results to determine the best overall exposure setting for the scene. Matrix Metering usually provides the best exposure results.
Also called Multi Segment Metering or Multi Pattern Metering.
Spot Metering
A type of Exposure Metering, where the exposure meter only takes into consideration a small spot in the center of the frame to calculate the exposure settings.
[F]
Field of View
The amount of a total scene captured by the camera’s image sensor. The human eye has a greater field of view than camera lenses i.e. we can see a greater degree of our surroundings than a camera lens can. A camera lens’ field of view is expressed by its focal length.
Also called FOV.
File Format
See Image Format.
Fill Flash
A flash mode where the flash fires with every shot no matter what the lightning conditions are. It is also called Force Flash. Fill Flash can be used to “fill” the shadows and reduce harsh contrasts in bright light conditions.
Flash
An artificial source of light for shooting in low light conditions. A flash uses a brief but intense burst of light, similar to bright daylight (5000 Kelvin). Most consumer digital cameras have an automatic flash mode that uses the flash automatically when required to ensure optimum exposure.
The effectiveness of a flash is dependant on the flash range. Weak flashlights, often found in ultra compact digital cameras usually have a flash range of less than 3 meters and are just strong enough to illuminate a medium sized room.
Flash Memory
The storage medium used in digital cameras to save photos and movies. Flash memory retains the stored data without power, allowing you to safely remove it from the camera. Flash Memory types commonly found in digital cameras are: SD cards, xD cards, Sony Memory Stick, Compact Flash cards.
Focal Length
The distance in mm from the center of the lens to its focal point. The focal length is usually given in 35mm equivalent, a popular film camera format. A normal lens, i.e. a lens that is similar to human vision has a focal length of around 50mm. A wide angle lens usually has a focal length of 18mm to 35mm and a telephoto lens commonly has a focal length of 70mm to 300mm.
See also Field of View.
Focus
Focus is the point at which rays of light converge after passing through the lens. This point is called focal point. A picture that is in focus is sharp and not soft or blurred. To focus means to adjust the distance of the lens to the image sensor so that the focal point is located on the surface of the image sensor and not behind it or in front of it.
Focus Lock
A technique to focus on an off center element in the composition and then moving the camera while keeping the focus locked. The focus is usually locked by half pressing the shutter button before shifting the camera position and fully depressing the button will take the picture.
FOV
See Field of View.
FPS
Frames Per Second. The number of frames displayed per second in a movie or video.
f-stop
A numerical measuring unit to determine the size of the aperture. A low f-stop number indicates a large lens opening, a high f-stop number a small lens opening.
Also called f-number or f-value.
Frame
Video and movies are made up of individual images called frames that are played back in quick succession to fool the human eye into seeing motion.
Frame Rate
The number of images displayed in a movie or video in a certain time interval, usually seconds. A minimum number of frames per second (fps) is required to give the impression of smooth motion. Common frame rates for digital camera movies are 30 fps (smooth) and 15 fps (choppy).
[H]
Histogram
A vertical bar graph that shows the distribution of bright and dark pixels in an image, also called tonal range. The X axis of the histogram shows the image’s tonal values on a scale from 0 to 255, with 0 representing black and 255 representing white. The height of each bar on the Y axis indicates the amount of pixels in the photo with the specific tonal value.
Hot Shoe
A connector used to connect an external flash.
[I]
Image Editor
A computer program to edit images and photos. Used to correct or manipulate images.
Image Format
The specifications by which image data is stored.
Common Image Formats used in digital cameras are: JPEG, TIFF, RAW.
Also called File Format.
Image Sensor
Unlike traditional cameras that use light sensitive film to capture an image, digital cameras use an Image Sensor. An image sensor is made up of millions of cells that capture the brightness of the image by converting the incoming light to electrical signals.
Also see CCD and CMOS.
Image Stabilization
An electronic or optical system to reduce camera shake and therefore the risk of blurred pictures. Usually, the result of an optical system is better than the result of an electronic one.
Image Stabilization is useful to reduce camera shake in low light conditions where longer slower shutter speeds are required, or when using a long telephoto lens without a tripod.
Interpolation
A technique used to increase or decrease the overall image size by adding or removing pixels. There are several interpolation methods, most of them look at a group of neighbouring pixels and try to estimate the color of the pixels to be added.
Interval Recording
See Time Lapse Recording.
Iris Diaphragm
Consists of overlapping metal plates that are arranged in a circle. The amount of overlap is adjustable and determines the size of the opening in the center of the circle. It works similar to the human iris: a large opening lets in more light, while a small opening allows less light to enter the camera body. The size of the opening is defined by the aperture setting.
ISO setting/sensitivity
Originally used in traditional film cameras to express the light sensitivity of the film. The higher the number the more sensitive the film is to light. The ISO sensitivity format is also used in digital cameras to express the camera’s light sensitivity. Digital cameras usually offer a range of different ISO settings, but like the film cameras are prone to producing grainy pictures at high ISO settings.
[J]
JPEG
Joint Photographic Experts Group. The name of the group that created the JPEG image compression format and the name of images stored in the JPEG format (JPEG images). JPEG is commonly used in digital cameras to store photos onto the storage medium because of its small file size compared to uncompressed images. The compression is not lossless however, meaning a certain amount of image detail is lost. This is usually hardly noticeable. If too much compression is applied, the image quality suffers and artifacts are visible.
Also see Artifacts.
[L]
Landscape Mode
Photos taken at horizontal camera orientation, where the width of the photo is greater than its height.
Also see Portrait Mode.
LCD
Liquid Crystal Display. In digital cameras high resolution color TFT LCD displays are used as a preview monitor/viewfinder replacement, usually placed at the back of the camera like a small TV. Low resolution LCD displays are also sometimes used to display additional information, usually with black text or numbers on a green background.
Also see TFT.
[M]
Macro/Macro Mode
Macro is the ability of the camera to focus on a subject very close to the lens. Set the camera to macro mode if you want to take an extreme close up shot.
Modern digital cameras usually have a macro mode distance between 0.8 – 3.9 inch / 2 – 10 cm.
Matrix Metering
See also Exposure Metering.
Megapixel
The resolution of a digital camera’s image sensor expressed in millions of pixels. A resolution of three megapixels equals 3 million pixels.
See also Resolution.
Memory card
See Flash Memory.
Memory Stick
A flash memory standard developed by Sony. The original Memory Stick has been further developed into the Memory Stick Pro and the Memory Stick Duo. These formats vary in maximum storage capacity and read/write speeds.
See Flash Memory.
Metering
See Exposure Metering.
Microdrive
A tiny hard disk that fits into a CompactFlash Type II slot.
Microdrives can offer large storage capacity, but consume more power than the flash memory storage solutions. They also create more heat which can lead to image quality problems and are more likely to fail because they contain moving parts.
MMC
See MultiMedia Card.
Motion JPEG
A common video format that stores each frame as an individual JPEG image.
See Movie.
Movie
A series of individual pictures displayed in rapid succession to create the illusion of motion.
Most consumer digital camera can record movie clips, with varying resolution and frame rate.
Common file formats for movie clips are: AVI, MOV, MPEG, Motion JPEG.
MP
Abbreviation for Megapixel.
See Megapixel.
MPEG
Motion Picture Expert Group. A highly compressed format for storing movie clips.
See Movie.
MultiMedia Card
A type of flash memory used in digital cameras as a storage medium. Identical in size and shape to SD card.
Also see Flash Memory, SD card.
Multi Segment Metering
See Matrix Metering.
Multi Pattern Metering
See Matrix Metering.
[N]
Noise
An effect caused by electric variations and interference in the image sensor. Noise appears as grainy or discoloured, randomly located pixels in the image.
Noise is most visible in areas with uniform color, e.g. a blue sky or a wall inside a room. Noise can increase with higher camera resolution, longer exposure times and higher ISO sensitivity.
[O]
Optical Viewfinder
See Viewfinder.
Optical Zoom
A lens with an adjustable focal length, allowing you to magnify a subject. A 3x optical zoom means that the maximum focal length is 3 times the minimum focal length. Unlike digital zoom, the optical zoom does not reduce the picture quality and should therefore always be preferred to the digital zoom.
See also Digital Zoom.
[P]
Panorama Mode
A feature that allows you to take panoramic images with an extremely wide angle of view. This is achieved by taking multiple photos that are then combined to one single image, usually with special computer software or directly inside the camera.
PictBridge
A standard that enables a digital camera to directly connect to printers and print photos without the need for a computer. Both digital camera and the printer need to support PictBridge for this feature to work.
Pixel
The smallest individual element of an image. Magnified a pixel looks like a tiny square and contains a solid color.
For example an image with a resolution of 1024 x 768 pixels consists of 1024 individual pixels in a horizontal row and of 768 rows, each of which contain 1024 pixels.
Also see Resolution.
Point and Shoot Camera
A camera that performs all required settings automatically, where the user only needs to point the camera at the subject and press the shutter release button.
Point and Shoot cameras usually have few settings and options that the user can manipulate.
Portrait Mode
Photos taken at vertical camera orientation, where the height of the photo is greater than its width.
Also see Landscape Mode.
Program AE
An exposure mode where the camera determines the most appropriate aperture value and shutter speed.
Also called Programmed AE, Automatic Mode or Point and Shoot Mode.
Also see Exposure, Automatic Exposure.
[Q]
QuickTime Movies
A video format created by Apply. Some cameras record video clips in Quicktime format rather than the AVI format.
Also see AVI.
QVGA
Quarter VGA (Video Graphics Array). Defines an image or video resolution of 320 x 240 pixels.
[R]
RAW
An image file format that stores the image data as it comes of the image sensor, uncompressed and unprocessed. Because the images are not altered in any way inside the camera, they are the most suitable format to perform image manipulation in an image editor program.
RAW files are larger than JPEG, but smaller than TIFF files and not all image editors can open and process them.
Redeye
Redeye is the effect of people seeming to have red eyes in a photo that has been taken using a flash. The redeye effect is caused by blood vessels in the retina of the human eye reflecting the light of the flash, which creates a red reflection.
The redeye effect is usually most visible when the flash light and the camera lens are positioned closely together, as is the case in compact and ultra compact cameras.
Redeye Reduction
Most cameras offer a redeye reduction flash setting. This causes the flash to fire a series of less powerful flash bursts before firing the main flash. This causes the pupils to close, allowing less light to enter and be reflected by the retina.
Resolution
A term used to describe the amount of pixels an image or an image sensor contains.
The image sensor resolution is commonly expressed in Megapixels and calculated by multiplying the horizontal resolution (number of pixels) with the vertical resolution.
When talking about image sensor resolution one needs to distinguish between overall resolution and effective resolution. Overall resolution is generally higher than effective resolution. Effective resolution is the number of sensor pixels that are actually used to collect image information.
In theory, the higher the resolution the better the image quality and the amount of detail contained in the image. Image quality is however also dependant on other components of the camera, such as the lens and the internal image processing. A camera’s resolution should therefore not be the only factor to judge a camera’s image quality.
Also see Image Sensor, Megapixel.
[S]
Scene Modes
An exposure mode where the user can select from a range of predefined camera settings (exposure, white balance, etc.) to best suit a specific shooting condition. Common scene modes are: Sport, Night, Landscape, Portrait, Close-Up.
Self Timer
A feature where the camera takes a picture after a certain delay, usually between 2 and 10 seconds. The self timer function is useful in group photos where the photographer should be in the photo as well.
SD Card
Secure Digital Card. A type of flash memory commonly used in digital cameras as a storage medium. Identical in size and shape to the Multimedia Card (MMC) but not all SD card compatible digital cameras will accept Multimedia Cards.
Also see Flash Memory, Multimedia Card.
Shutter
The shutter is located in front of the image sensor and opens and closes to expose the sensor to light for a specific amount of time, called the shutter speed.
Shutter Lag
The delay between pressing the shutter button and the camera actually capturing the image. The delay is caused because the camera needs to calculate the correct exposure, focus on the subject and set the white balance.
Shutter Priority
See Automatic Exposure.
Shutter Speed
The duration the shutter is open to let light onto the image sensor. Shutter speed is measured in seconds. Short shutter speeds (e.g. 1/2000 sec.) are typically used when photographing fast moving objects, slow shutter speeds are used in low light situations (e.g. 2 sec.).
Slow Sync Flash Mode
A flash mode with a slow shutter speed where the flash fires just before the shutter closes. Slow Sync mode is used to illuminate a subject in the foreground with the flash while still allowing background details to be visible through natural light exposure.
SLR Camera
SLR means Single Lens Reflex. Unlike other cameras, SLR cameras offer interchangeable lenses and a through the lens viewfinder (TTL). SLR cameras typically offer full manual controls and are usually used by experienced and professional photographers.
SmartMedia
A flash memory card developed by Toshiba. SmartMedia cards only support a capacity of up to 128MB are not used in modern digital cameras any more.
Also see Flash Memory.
Spot Metering
See Exposure Metering.
SVGA
Super Video Graphics Array. Defines an image resolution of 800 x 600 pixels.
[T]
Telephoto Lens
A lens that enlarges the subject size. A Telephoto Lens has a longer focal length and a narrower field of view than a normal lens. Telephoto Lenses typically range from a focal length of 70mm up to 300mm (35mm equivalent).
TFT
Means Thin Film Transistor and is a type of LCD commonly used in digital cameras. Compared to other LCD types, TFT produces very good image quality and is capable of displaying fast moving action without blurring the picture. On the downside it uses more power.
TIFF
Tagged Image File Format. An image format that is lossless. Useful when maximum image quality is necessary, for example to manipulate the photo in an image editor. Requires more space to store photos than a compressed file format such as JPEG. Image formats like TIFF are more demanding on the camera because more data needs to be processed and moved quickly from the image sensor to the storage medium, increasing the price of the camera.
Also see Image Format.
Time Lapse Recording
A feature that takes images at set intervals. Time Lapse Recording intervals are much longer than Self Timer Intervals, usually minutes or hours.
Also called Interval Recording.
TTL
Through The Lens Metering. Exposure or focus metering that is performed through the lens of the camera and not through sensors attached to outside of the camera case. Through The Lens is sometimes used incorrectly to refer to a dSLR camera. TTL and dSLR is not the same and not only dSLR cameras come with TTL Metering.
Also see dSLR.
[U]
USB
Universial Serial Bus. Interface to connect a digital camera to a computer to transfer photos or movie clips. USB 1.1 supports transfer rates of up to 12 Megabytes per second.
USB 2.0
New USB standard that supersedes USB 1.1.
USB 2.0 supports transfer rates of up to 400 Megabytes per second. USB 2.0 is compatible with the older USB versions but transfer speed will drop to 12 Mb/s if either camera or computer are equipped with a USB version prior to 2.0.
[V]
Viewfinder
The device that enables you to view the scene, to frame the shot before taking the picture.
Several types of viewfinders exist in digital cameras:
- optical viewfinder:
an optical system with an eyepiece at the back of the camera to look through to view the scene. Before the arrival of digital cameras this was the most commonly found type of viewfinder in film cameras. - electronic viewfinder, also called LCD viewfinder:
similar to an optical viewfinder where you look through an eyepiece but the image is created by a small LCD monitor. - LCD monitor:
most digital cameras are equipped with a small LCD display on the back of the camera that allows you to preview the scene. A lot of the ultra compact digital cameras offer an LCD monitor as the only viewfinder option and are not equipped with an eyepiece to look through. This can sometimes be a problem in bright light conditions when it is difficult to see the LCD monitor.
VGA
Means Video Graphics Array and defines an image resolution of 640 x 480 pixels
[W]
White Balance
The color of an object depends on the light source that shines on it. Different light sources emit different colored light (color temperature). For example, candle light contains a lot of red color, a light bulb a lot of yellow, whereas direct sunlight around midday is mostly white. The human brain is capable of compensating color changes in light, so that a white object always appears as white no matter what light source shines on it. Similarly, digital cameras use white balance to adjust the colors in a scene accordingly .
Digital cameras offer several types of white balance:
- automatic:
the camera tries to determine a white reference in the scene and adjusts all other colors accordingly - preset:
user selectable white color references stored in the camera for typical light conditions, such as daylight, cloudy, fluorescent light. - manual:
allows you to choose your own reference by aiming the camera at a white object in the scene (a white piece of paper if no white object is present in the scene)
Wide Angle Lens
A lens that offers a wide angle of view, typically with a focal length between 35 and 18mm. A Wide Angle Lens is useful for shooting in confined spaces (indoors), or for shooting panoramic scenes.
[X]
xD-Picture Card
Abbreviation for eXtreme Digital Picture Card. The card was developed by Fujifilm and Olympus in 2002 and is used as a storage medium for photos and movie clips in digital cameras. Current xD cards can hold up to 1 Gigabyte of data, capacities of up to 8 Gigabytes are being developed.
XGA
Abbreviation of eXtended Graphics Array. Defines an image resolution of 1024 x 768 pixels.
[Z]
Zoom Lens
A lens with variable focal length. Most consumer digital cameras are equipped with a Zoom Lens.
Also see Focal Length.