Perspective/Night Photography

Question 1

What is Perspective as it relates to photography?

Answer 1

The rendition of 3D objects onto a flat, 2D surface in such a way as to convey the impression of depth and distance.

Question 2

What are the approximate angles of view for normal, wide and telephoto lenses?

Answer 2

Normal 46 degrees

Wide 75 degrees

Telephoto 35 degress

Question 3

What changes perspective?

Answer 3

Changing the camera position will change perspective. Changing the focal length of lenses does not change perspective.

Question 4

What is True Perspective?

Answer 4

To obtain a photograph that will give the same view as if you were at the scene, it has to be viewed in a very specific manner. When this is accomplished, the viewing is said to have true perspective.

Question 5

How do you calculate Viewing Distance?

Answer 5

Distance = Focal length of lens X Number of times enlarged.

Number of time enlarged:

FX sensor - enlargement = shorter side of enlargement (i.e. for 8x10, enlargement is 8x)

DX sensor - enlargement = longer side of enlargement (i.e. for 8x10, enlargement is 10x)

Question 6

What are different flash techniques for night photography?

Answer 6

• Synchronized flash at the camera (on mount)
• Flash with slow and rear sync (om mount)
• Multiple flashes at the camera
• Multiple flashes away from the camera
• Painting with light
• Available light (timed exposure)

Question 7

What are the benefits of flash with slow and rear sync?

Answer 7

Flash is combined with slow shutter speeds to capture both subject and background at night or in dim light.

Question 8

What are the benefits of multiple flashes at the camera?

Answer 8

• improves depth of field
• improves the light coverage of a scene
  
  • determine f stop for 1 flash
  • double # of flashes for every f stop down

Question 9

What are the benefits of multiple flashes away from camera?

Answer 9

• improves the depth of field
• improve the light coverage of a scene
• good for long scenes
• check distance of light coverage on flash (coverage on flash, x meters) and flash every x meters on both sides.
• place dark object in front of lens between flashes

Question 10

What are the benefits of painting with light?

Answer 10

• amount of ambient light in the area will determine how long to paint the scene
• be sure to cover the entire scene
• set camera on manual
• appropriate aperture
• shutter on “bulb”

Question 11

What are the benefits of available light?

Answer 11

• the amount of ambient light in the area will determine how long to expose the scene
• set the camera on manual mode
• choose an appropriate aperture
• shutter on “bulb”