Digital cameras in use today create pictures made up of millions of pixels. … Aperture is the length of time that light is let into the camera in order to expose the film. False. Pinhole cameras
How does digital camera work?
A digital camera
takes light and focuses it via the lens onto a sensor made out of silicon
. It is made up of a grid of tiny photosites that are sensitive to light. Each photosite is usually called a pixel, a contraction of “picture element
Do digital cameras use an electronic image sensor to digitally record an image?
Digital cameras use an
electronic image sensor
to digitally record an image. TIFF is the default file format for most digital cameras. In a pinhole camera
What are the two basic types of digital photography?
The Two Types of Digital Images:
Vector and Raster
.
Do pinhole cameras use Conflex lens?
Pinhole cameras use
a conflex lens
. A photograph is taken by letting light fall on a light-sensitive medium, which then records the image onto that medium. Aperture is the length of time that light is let into the camera in order to expose the film. … Digital zoom tends to have no effect on the quality of the image.
Can raw files be compressed without losing information?
RAW files
can be compressed without losing information
. In a pinhole camera, the image seen in the camera will be inverted.
What is the default file format for most digital cameras?
Most compact-style digital cameras have
JPEG
as their default capture format; some allow you to select between JPEG and other file formats. JPEG is a ‘lossy' compression format. When you save an image as a JPEG file, a certain amount of picture information is irretrievably discarded.
What are the main types of digital photography use today?
Most cameras can be grouped into four main types:
digital SLR (or DSLR), point-and-shoot, bridge cameras, and camera phones
. Each type has advantages and disadvantages, and some types are more expensive than others. To narrow down your search, try to determine which of these types will best fit your needs.
What do all digital cameras have?
Digital and digital movie cameras share
an optical system
, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The diaphragm and shutter admit the correct amount of light to the image, just as with film but the image pickup device is electronic rather than chemical.
What is special about a digital camera?
A digital camera is
a camera that stores pictures in electronic memory instead of film
. Because of this, a digital camera can hold many more pictures than a traditional film camera. A digital camera can sometimes hold hundreds or thousands of pictures. … They can send their pictures to other phones and other devices.
What lens do pinhole cameras use?
A pinhole camera is a simple camera
without a lens
but with a tiny aperture (the so-called pinhole)—effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
Can fluorescent lights give a photograph a greenish tint?
Fluorescent lights can give a photograph a
greenish tint
. The light that comes from strobe lights can create strong shadows, and without other accessories, it is often too strong. True. Reflectors are used to reduce shadows and bring more light to certain areas of a photograph.
Was the pinhole camera was invented in 1811?
The pinhole camera was invented in
1811
. The technology that contributed to digital cameras came from spy satellites used during the Cold War. Kodak initially included film processing in the cost of the film itself. The daguerreotype process was inexpensive and easy for just about anyone to use.
Do RAW files use compression?
The RAW file format uses
a lossless compression
, and so it does not suffer from the compression artifacts visible with “lossy” JPEG compression. RAW files contain more information and achieve better compression than TIFF, but without the compression artifacts of JPEG.
What type of compression does RAW use?
Lossless compression
What is the equivalent of film speed in digital cameras?
In digital cameras,
the sensitivity of the camera's image sensor
is the equivalent of film speed.
