aspects of the camera

Question 1

Aperture

Answer 1

The hole within a lens, through which light travels into the camera body. Larger hole = more light. expressed in “f” numbers

Question 2

Aspect Ratio

Answer 2

defines the relationship between an image’s lengths, represented as width:height.

Question 3

ISO

Answer 3

represents the sensor’s sensitivity to the light and resulting effect on the image. Higher ISO = more sensitivity to light, but more grain.

Question 4

Shutter Speed

Answer 4

the length of time a camera shutter is open to expose light to the camera sensor.
Slow shutter speeds allow more light into the sensor, fast speeds help freeze motions.

Question 5

Focal Length

Answer 5

is the distance in millimeters between the center of a lens and the camera sensor. It determines the angle of view as well as the magnification of the subject.

Question 6

Focus

Answer 6

the sharpest area of the image. It is the area where the lens works to highlight an object, a person, or a situation.

Question 7

Depth of Field

Answer 7

Aperture controls this.
it is the portion of a scene that appears to be sharp. If the aperture is very small, the depth of field is large, while if the aperture is large, the depth of field is small

Question 8

Exposure

Answer 8

amount of light that reaches the camera sensor and it determines how light or dark an image is.
determined by the aperture, shutter speed, and ISO.

Question 9

Pixel

Answer 9

Pixel is the smallest unit of programmable color represented on a digital display.

Question 10

Resolution

Answer 10

the dimension in megapixels that a camera sensor is able to capture.

Question 11

PPI

Answer 11

pixels per inch, refers both to the fixed number of pixels that a screen can display and the density of pixels within a digital image. (Not the same as pixel count)

Question 12

DPI

Answer 12

dots per inch, refers to the resolution value of a physical printer. Printers reproduce an image by spitting out tiny dots, and the number of dots per inch affects the amount of detail and overall quality of the print.

Question 13

Lossy Compression

Answer 13

Lossy compression means that the image size is reduced while some data from the original image file is eliminated. The lossy image process is irreversible.

Question 14

Lossless Compression

Answer 14

Lossless compression means that you reduce the size of an image without any quality loss.

Question 15

F-Stop/F-Number

Answer 15

the ratio of the lens focal length to the diameter of the entrance pupil. the number that your camera shows you when you change the size of the lens aperture.

Question 16

Histogram

Answer 16

Histogram is the visual representation of the luminance of an image. The left side of the graph represent the shadows, while the right side belongs to the highlights. The height of the histogram shows how many pixels there are for each specific luminance level.

Question 17

Metadata

Answer 17

also known as EXIF, is the essential information about the image. This includes dimensions, resolution, keywords, camera settings, focal length, copyright owner, etc

Question 18

Dead Pixels

Answer 18

A dead pixel is a permanently damaged pixel that does not receive any power, which often results in a black spot on the camera LCD.

Question 19

Hot Pixels

Answer 19

hot pixels only show up when the camera sensor gets hot during long exposures or when the ISO is cranked up above 400-800. Hot pixels are very normal and they will show up even on brand new cameras.

Question 20

Stuck Pixels

Answer 20

they always receive power, which results in a colored pixel that shows up in the same spot on the camera LCD or on the sensor/images. Stuck pixels are very common, but not permanent like dead pixels

Question 21

Banding

Answer 21

Color banding in photos is distracting discolorations—colors that should gradually move from one shade to the next instead jump to the next color. You see distinct bands or rows of color instead of a gradual transition.

Question 22

Blooming

Answer 22

When shooting a bright light source such as direct sunlight, the source of the light may appear as a bright halo with column or line defects around the highlight.

Question 23

Firmware

Answer 23

Firmware refers to the software your camera uses to operate. It exists on a microprocessor inside your camera, and it controls the features and functions attached to camera menus and buttons, as well as autofocus algorithms, image processing, noise reduction, and more.

Question 24

Light Meter

Answer 24

measures the scene’s luminosity in order to determine the best exposure value.

Question 25

Metering

Answer 25

describes the process of how your camera decides to assign the right shutter speed and aperture based on the amount of light the camera can pick up.

Question 26

HDR (High Dynamic Range)

Answer 26

a technique that gives images a wider dynamic range than the one captured by the camera.

Question 27

Bulb

Answer 27

Bulb is a camera setting that holds the shutter open for as long as the shutter release button is pressed. In some cases, the shutter release needs to be pressed once to open the shutter and once to close it, rather than remaining pushed down.

Question 28

Contrast

Answer 28

Contrast defines the range of tonal difference between the shadows and lights of an image.

Question 29

Noise

Answer 29

a visual distortion that looks like tiny colored specs on a photo. It is especially visible in images shot at high ISO or very slow shutter speeds.

Question 30

DSLR

Answer 30

Digital single lens reflex.
A digital camera that uses a mechanical mirror system to direct light