Significance of Lenses

Question 1

What are the 3 Basic Components of a Cinema Lens?

Answer 1

1. Focal Length.
2. Stop or IRIS.
3. Focus.

Question 2

What are the functions of the 3 Basic Components of a Cinema Lens?

Answer 2

1. Focal Length -> Is the number associated with the optical power of the lens. (The number = How magnified a lens is).
2. Stop (Iris) controls how much light you let in.
3. Focus -> Controls how much of the frame is in focus.

Question 3

What are the features and differences between a Zoom Lens and a Prime Lens?

Answer 3

A prime lens has a fixed focal length that cannot be optically magnified whereas zoom lenses allow the operator to alter the focal length of a lens.

Question 4

Name 2 popular contemporary prime lenses:

Answer 4

• ARRI SIGNATURE PRIMES.
• COOKE S4s
• Leica Summilux Cs
• Panavision Primos.

Question 5

Name 2 Popular contemporary zoom lenses:

Answer 5

• Angeneiu Optimo (24-290mm)
• FUJINON 80-250MM
• PANAVISION PRIMO (19-90MM)

Question 6

What do the numbers on the focal length suggest?

Answer 6

The higher the focal length, the tighter the shot. The lower the focal length, the wider the shot.

Question 7

Name 3 common wide focal lengths:

Answer 7

• 18mm
• 24mm
• 35mm

Question 8

Name 3 common long focal lengths:

Answer 8

• 85mm
• 100mm
• 135mm

Question 9

How do lenses affect the depth of field in an image?

Answer 9

Wider lenses allow us to see more of the background with a deeper focus whereas longer lenses compress the background and have a shallower depth of field.