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cate an exposure adjustment of only 1/3 f/stop, but your picture will be exposed in the 1/3 f/stop increment you set on the dial.

Generally, exposure should be corrected whenever the high-key (light) or low-key area occupies more than half of the total viewing area. How much more or less exposure should be given depends on the lighting condition as roughly described below. However, these are only general guidelines meant to help you while experimenting.

Some situations require special measures. For instance, when shooting a subject against the sun or some other exceptionally strong light source, requiring drastic exposure correction, or when you shoot a subject in an unvarying lighting condition such as under photo lamps in a studio, it

Scale

Exposure Correction

Application

 

1/4

2 f/stops underexposure

Black background

 

:

 

Spot lighting

 

1/2

1 f/stop underexposure

Black background occupying half of viewing area

 

:

 

 

 

1

Normal

 

 

:

 

Overhead interior lighting

 

2

1 f/stop overexposure

Subject by a window

 

:

 

Blue sky or sea backgrounds occupying half of viewing area

 

 

 

Contre-jour portrait, white background, snow scene or blue

 

4

2 f/stops overexposure

 

 

 

sky background .

 

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