Nikon SB 20 User Manual

Page 85

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Usable film speed

range in TTL mode

Usable aperture

range in TTL mode

A mode

Usable apertures in

A mode

ISO 25 to 1000 with Nikon
F-501/N2020 and F-301/
N2000 or ISO 25 to 400 with
Nikon F-401/N4004, FA, FE2,

and FG

f/2tof/22 (at ISO 100)

For non-TTL auto flash oper

ation; light is measured via

light sensor in front of fhe

flash unit

f/2, f/2.8, f/4, f/5.6 and f/8

(at ISO 100)

Shooting distance range in A mode

Unit: m (ft.)

Aperture

Shooting distance range at ISO

too

and zoom set ring set at

f/2

1.9-15(6.2-49)

f/2.8

1.3-10(4.3-33)

f/4

1.0-7.5(3.3-25)

f/5.6

0.7-5.3(2.3-17)

f/8

0.6-3.7 (2.0-12)

M mode

For manual flash operation;

amount of light output can be

varied in five sfeps