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Canon 166 A User Manual

Page 43

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3. Focus the subject,

4.

Read the shooting distance from the

lens’ distance scale

5.

Calculate the aperture using the fol­

lowing guide number formula:

guide number

Aperture —-------------------------------------

shooting distance

6

Set the aperture on the lens.

7

Turn the main switch ON

8

Do not press the shutter button until

the pilot lamp glows

*

The 166A’s guide number is 20 (ASA

100, m) or 33 (ASA 25, ft.)

' Make sure that both the guide number

and shooting distance are in the same

unit, whether meters or feet

The guide number changes with film

speed Attach the guide number table

onto the 166A for convenient use,

' If it is necessary to shoot immediately

after the pilot lamp glows, open the

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