Lenses

Question 1

what is the purpose of focal length?

Answer 1

is to take parallel rays of light and converge them into a single point of focus so they can be recorded, either on a price of field or a far more commonly with a digital sensor

the point where the lens cause the light rays to converge is called the focal point

Question 2

why is focal length used?

Answer 2

it tells us one very important thing:
-what the field of view of that lens will be. since the sensor remains the same size regardless of what lens you use, the field of view tells us how much the lens can madnify distant objects

Question 3

the shorter the focal length what kind of field of view?

Answer 3

wider

Question 4

a longer focal length what kind of field of view?

Answer 4

narrower

Question 5

a zoom lens has a variable focal length of what?

Answer 5

18-55MM

Question 6

a prime lens has a fixed focal length of?

Answer 6

50MM

Question 7

standard lens have what kind of focal length?

Answer 7

mid rang3 somewhere around 50’m but anything between 40-60 mm

Question 8

what does the standard lens focus length show?

Answer 8

a full frame camera will give you roughly the same field of view as the naked eye - not exact. it will look natural with no distortion

Question 9

standard lens are use to photograph?

Answer 9

• portraits
• street
• indoor
• landscape

Question 10

what kind of focal lengths to telephoto lens have?

Answer 10

longer focal lengths and they magnify subjects allowing you to take photos of subjects that are farther away

Question 11

telephoto lens have a focal length of?

Answer 11

above 60MM but can range to around 70-200MM and then “super telephoto” which is anything over 200MM or more

Question 12

when will you use telephoto lens?

Answer 12

when you are far away from a subject such as wildlife and sports

Question 13

what kind of telephoto lens are used in what type of photography?

Answer 13

• wildlife
• sports
• astronomy
• where you want background blue

Question 14

what are the focal length or wide angle lens?

Answer 14

wider range anything below 40MM,
everything is zoomed out

(smaller the number the more fit in the frame and more distortion)

Question 15

wide angle lens is used in what photography?

Answer 15

• group photos
• lifestyle
• environmental shots
• architecture

Question 16

what kind of feel does wide angle else give of?

Answer 16

inclusive feel to an image in other words viewer feels like they are there

Question 17

what are macro lens for?

Answer 17

close up photography, they have the ratio of 1:2 which basically means they can capture your subject at a life size magnification

capturing details

Question 18

what type of photography will you sue macro lens for?

Answer 18

• nature
• insect
• portraiture

Question 19

what is a fish eye lens used for?

Answer 19

type of lens that produces an extreme wide angle image with distortions that makes straight lines seem curved

Question 20

what are fisheye lens good for?

Answer 20

• photographing churches and indoors
• equally good lenses for waking around the city and emphasis the height of buildings as well as capturing bird eye views