Location Photography (2nd ed) by Mark Galer

Author:Mark Galer
Language: eng
Format: epub
ISBN: 0240516699

Filter factor

Exposure increase in stops

Density

1.25

1/3

0.1

1.5

2/3

0.2

2

1

0.3

2.5

1 1/3

0.4

3

1 2/3

0.5

4

2

0.6

5

2 1/3

0.7

6

2 2/3

0.8

8

3

0.9

10

3 1/3

1.0

Revision exercise

Q1. What is different about a skylight filter when compared to a UV filter?

(a) No difference

(b) A skylight filter is a colour compensation filter offering no UV reduction

(c) A skylight filter offers UV reduction and colour compensation.

Q2. What is the purpose of a neutral density filter?

(a) Prevent underexposure (b) To reduce glare

(c) To darken blue skies

(d) To enable reduced depth of field or extended shutter speeds when the ambient light is bright.

Q3. What precautions must be taken when using a polarising filter on a wide-angle lens?

(a) Remove any UV or skylight filter (b) Fit a lens hood

(c) Shoot at right angles to the sun

(d) Apply appropriate exposure compensation to TTL light meter reading.

Q4. What coloured filter is required to correct tones to that of human vision when using black and white film?

(a) Skylight (b) Yellow (c) Yellow/Green (d) Orange.

Q5. What exposure compensation is necessary when using a red filter?

(a) Divide the exposure by a factor of 8. (b) Increase exposure by 2 stops.

(c) Increase exposure by 3 stops or more. (d) Increase exposure by 8 stops.

Q6. What filter is required to convert the colour temperature of daylight to that which is suitable for a tungsten film?

(a) 81A (b) 81B (c) 80B (d) 85B.

Q7. When would you use an 80A filter?

(a) As a warming filter to remove a blue cast from shadows.

(b) As a colour conversion filter when using Daylight film and Tungsten light.

(c) As a cool colour balancing filter.

Q8. What is an FLD filter used for?

(a) Lowering density. (b) Fully correcting the cast of all fluorescent lights.

(c) A filter for partially correcting the cast of most fluorescent lights.

Gallery

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