Rich B Young

 

 

Installment 2:

A Little Tutorial Regarding Proper Exposure...

Our Cameras are designed to read and record:

1) White as Gray,

 

2) Gray as Gray,

 

3) Black as Gray

All the above examples reduce the images of test cards shown below as:

18% Reflectance Gray!

 

 

 

 

Photographing each of the above cards (White, Gray, Black) results in a

GRAY IMAGE for each exposure!

 

Procedure:

The camera was set on 'Aperture", "auto exposure", allowing the shutter to determine the exposure.

(Aperture-f5.6 with ISO:800 setting)

The 3 images,

White, Gray, Black

were taken under Controlled Constant Light in my studio.

Camera results are shown in the 3 camera displays ("Output"), reproduced below:

 

 

 

HOW CAN THIS AFFECT YOUR PHOTOGRAPHY?

 

This phenomenon adversely affects photos when photographing an object against a

CLOUDY ("Bald") sky, OR ANY WHITE BACKGROUND (SNOW).

 

What can you do about it?

If your camera allows for exposure control, set it for

+1.7 exposure increase

to correct for it "seeing the BACKGROUND as 18% Gray."

 

Below are examples of

BEFORE and AFTER

Images that demonstrate the differences between camera

"auto-exposure"

and

correct (adjusted) exposure.

ROLL MOUSE OVER EACH IMAGE TO SEE THE DIFFERENCES

Common Goldeneye

 

 

 

American Kestrel

 

 

 

Prairie Falcon