Focal Length

Question 1

What is focal length?

Answer 1

Focal length is the distance from the center of the lens and the camera center, measured in millimeters.

Question 2

What does focal length determine?

Answer 2

The focal length of a camera determines how much of a scene the camera can capture and the magnification of the image.

Question 3

The longer the focal length _____.

Answer 3

The longer the focal length the narrower the angle of view and the higher the magnification.

Question 4

A 600mm maximum focal length lens has what kind of view and for what is it typically used for?

Answer 4

A 600 mm maximum focal length lens has the smallest angle of view and will magnify a distant object more. This type of lens is often used for bird and wildlife photography.

Question 5

A 50 mm focal length is considered ___

Answer 5

A 50 mm focal length camera is considered the most normal and is a good choice for beginners. It’s the midpoint between two common categories of lenses, wide-angle and tele photo.

Question 6

What is the best focal length range for photographing people?❌

Answer 6

The best focal lengths for photographing people are between 50mm an 135 mm.

Question 7

For what would you use a 50 mm prime lens and why?

Answer 7

Good for photographing people. Allows for less distortion.

Question 8

What is the focal length of the human eye?

Answer 8

22mm

Because we have two eyes, human vision is approximately 210 degrees of horizontal arc.

Question 9

What is the appropriate focal length for a beginning camera?

Answer 9

35 mm

Question 10

What is the range of length of a “super-wide” lens

Answer 10

Between 16mm and 24 mm

Question 11

Focal lengths under ___ are considered ultra-wide angles?

Answer 11

Focal lengths below 16 mm are considered ultra-wide angles.

Question 12

What is a good focal length range for PORTRAIT photography?❌

Answer 12

70 mm to 200 mm produces the most flattering angle of view for most’s people’s features.

Question 13

Is focal length the same as aperature?

Answer 13

No

Question 14

What focal length best approximates the human eye?

Answer 14

50 mm

Question 15

What is the focal length of an iphone?

Answer 15

Depends on iPhone

13-26
Pro = 13 26 77
The focal length of an iPhone is 26mm for the wide-angle lens and 13mm for the ultra-wide-angle lens. The iPhone Pro and Pro Max have a three-lens camera system with a 77mm telephoto lens, a 26mm wide lens, and a 13mm ultra-wide lens.

Question 16

What does focal length determine?

Answer 16

ANGLE OF VIEW

Focal length affects your angle of view. And your angle of view is how much of the world your camera lens can see. A lens with a shorter focal length, like 24mm, can see more of the scene than a lens with a long focal length, like 300mm. Lenses with smaller focal length numbers capture a more expansive view.

Question 17

What is the relationship between aperture size and brightness?

Answer 17

Aperture size determines how much light enters a camera lens and how exposed the photo will be. The larger the aperture, the more light that comes through the lens, resulting in a brighter image. Aperture size also adjusts the depth of field and image sharpness. A larger aperture reduces the depth of field,

Question 18

With F stop, the bigger the bottom number…

Answer 18

The smaller the opening in the lens.
A higher f-stop lets in less light than a lower f-stop.

Question 19

What does doubling shutter speed do to photo?

What does halving iso do?

Answer 19

when you double the exposure duration, it doubles the brightness; when you halve the ISO, it halves the brightness.

Question 20

What is angle of view?

Answer 20

The AOV describes how much of the scene a lens can take in. It is used interchangeably with the term “field of view”.

Question 21

What does a diagram of focal length look like?

Answer 21

Question 22

What does aperture size determine?

Answer 22

Aperture size determines how much light enters a camera lens and how exposed the photo will be. The larger the aperture, the more light that comes through the lens, resulting in a brighter image. Aperture size also adjusts the depth of field and image sharpness. A larger aperture reduces the depth of field,

Question 23

What is the optical center of a lens?

Answer 23

the central point of the lens through which a ray of light passes without suffering any deviation.