Workshop 2 – Studio Week 4 research questions

In a given situation you are using a Pulso 2 flash pack with a single head and P70 reflector attached.  The subject is 2m from the head and the unit is set to a power setting of 10 and a flash meter indicates correct exposure will be achieved by using f64.  Your maximum lens aperture is f2.

Given:

Unit: Pulso 2
Heads: 1
Reflector: P70
Subject d: 2m
Power: 10
f-number: f64

Answer the following questions.

1. The Guide Aperture (GA) of this unit is;

[a] 64

2. Moving the subject to a new distance of 4m would require the use of;
[c] f32


3. Moving the subject to a new distance of 8m would require the use of;

[e] f16

4. In the given situation above, what f-number would you use to achieve correct exposure if the subject was moved to 64m?

f2

In a given situation you are using a Pulso 2 flash pack with a single head and P70 reflector attached.  The subject is 64m from the head and the unit is set to a power setting of 10 and a flash meter indicates correct exposure will be achieved by using f2 for a single flash discharge. Your maximum lens aperture is f2.

Given:

Unit: Pulso 2
Heads: 1
Reflector: P70
Subject d: 64m
Power: 10
Flash number: 1
f-number: f2

5. Complete the table below to maintain correct exposure for each new power setting.

Pulso 2 Flash Power setting
Number of flashes
Required to maintain correct exposure.
10 > 1 flash
9 > 2 flashes
8 > 4 flashes
7 > 8 flashes
6 > 16 flashes


Let’s make this challenging, 

6. Assuming you have just correctly exposed your subject in the previous question with power setting of 6; how many flash discharges would you need to correctly expose the subject if it was now moved to 128m.

Answer: __32__ flashes  (phew)