Photography-Richard

Question 1

Name 6 types of camera

Answer 1

range finder
mirrorless
point and shoot
plate or view
single lens reflex
twin lens reflex

Question 2

Problems of mobile phone cameras?

Answer 2

small
light
automatic mode only
computational imaging

Question 3

SLR cameras

Answer 3

interchangeable lenses
optical viewfinder
no parallax issues
accessories available

Question 4

Interchangeable lenses

Answer 4

lenses are defined by focal length, maximum aperture (measured in f stops)

Question 5

example: what do each bits mean for: Nikon 18-55mm f3.5-5.6 AF-S VR

Answer 5

zoom lens with focal length that can be zoomed eom wide angle (18mm) to short telephoto (55mm)

has maximum aperture that varies according to zoom

capable of auto-focus

has anti-shake(vibration reduction technology)

Question 6

The camera lens

Answer 6

beams of light reflected from scene enter lens where they are redirected to form an image

Question 7

Are camera lenses converging or conveying?

Answer 7

converging

bring beams of light which fiver into line so that they converge on a single point- point of focus

Question 8

what does camera lens do?

Answer 8

objects closer to the lens appear large and objects further away look smaller

closer an object gets to the lens the more the light must bend to become focussed.

further an object gets from the lens the less the light must bend to become focussed

Question 9

Focussing

Answer 9

lens included mechanism which allows the lens elements to move backwards and forwards in the lens barrel to allow the photographer to select what should be in focus

can be done manually or using auto-focus

Question 10

what is the focal length

Answer 10

distance between the point of convergence and the sensor

Question 11

focal length

Answer 11

measure of field of view

smaller focal lens=wide angle lens

normal lens=human eye

short-telephoto=portrait lens

longer focal length lenses are often called telephoto lenses and enable imaging of far off objects

extreme examples include ultra wide and fisheye lenses

Question 12

what are normal lenses

Answer 12

lenses which have a focal length equivalent to human vision

focal lenght=35mm

Question 13

problem with wide angle lenses

Answer 13

distort image

enormous depth of field which means impossible to get an out of focus background or foreground

Question 14

problem with telephoto lenses

Answer 14

image looks flat

little depth of field

smaller maximum aperture

heavy

Question 15

what is a zoom lens

Answer 15

lens which allows a range of focal lengths

Question 16

problem with zoom lenses

Answer 16

perform less well

unlikely to offer large maximum apertures

Question 17

macro lens

Answer 17

focus closely

any lens that can produce an image on the camera sensor which is the same size or bigger than the original object

Question 18

perspective control (tilt shift) lens

Answer 18

ensures vertical lines are vertical

when using wide angle lenses, vertical lines may sometimes appear to converge

occurs when camera not parallel to subject

perspective control lens allows lens to be shifted off axis

Question 19

what is it called when vertical lines converge in images?

Answer 19

perspective projection distortion