Canon AT 1 Spezifikationen PDF herunterladen (Seite 73)

Infrared film (film with extended sensitivity to infrared light) can be used to

achieve interesting effects not possible with general-purpose film. When

using black-and-white infrared film, the film’s sensitivity to longer wave-

lengths requires a slight adjustment in focus using the red infrared index

on the lens. Use a deep red filter to maximize the infrared effect.

•

When shooting with infrared film, use a lens equipped with a distance scale window.

• For black-and-white and color infrared photography, read the instructions provid-

ed with the film for proper use.

6. Infrared Photography

50mm

510

1 1.5

510

1.5

510

1.5

510

1 1.5

510

1.5

510

1.5

510

1.5

Focus the subject.

Set the lens’ focus mode switch to

“M”.

Read the focus distance from the

distance scale window.

• In this example, the distance from the

camera to the subject is 3 m / 10 ft.

Manually align the lens’ infrared

index with the 3 m / 10 ft index on

the distance scale.

•

The lens’ infrared index is set for a

wavelength of 800 nanometers.

However, the wavelength characteristics

of general black-and-white infrared film

varies depending on the type (750~830

nanometers). Therefore, to ensure prop-

er focus when shooting with infrared

film, we recommend to take extra shots

with the lens adjusted slightly to the

front and rear of the infrared index.

•

The characteristics of the lenses listed

below are such that they do not require

focus adjustment when using black-and-

white infrared film. These lenses are there-

fore not equipped with an infrared index.

EF200mm f/1.8L USM

EF300mm f/2.8L USM

EF500mm f/4.5L USM

EF600mm f/4L USM

00. Part.4 RS (E) (P.65~75) 27-01-2003 11:59 Page 73

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