Nikon 25214 D70 User's Guide - Page 105

Flash Sync Modes, Flash Angle, ISO Auto

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Taking Photographs-Flash Photography Flash Sync Modes The following flash sync settings are available in P, S, A, and M modes: Flash sync mode Front-curtain sync Red-eye reduction Slow sync Description This mode is recommended for most situations. In P and A modes, shutter speed will automatically be set to values between 1/60 and /1 500 s. Red-eye reduction lamp lights for approximately 1 s before main flash, causing pupils in subject's eyes to contract and reducing "red-eye" effect sometimes caused by flash. Owing to 1 s shutter-release delay, red-eye reduction is not recommended with moving subjects or in other situations in which quick shutter response is required. Do not move camera while red-eye reduction lamp is lit. Flash is combined with shutter speeds as slow as 30 s to capture both subject and background at night or under dim light. Available only in P and A modes. Use of tripod is recommended to prevent blurring caused by camera shake. Combines red-eye reduction with slow sync. Available only Slow sync with red- in P and A modes. Use of tripod is recommended to prevent eye reduction blurring caused by camera shake. In S and M modes, flash fires just before shutter closes, creatRear-curtain sync ing effect of stream of light following moving subjects. In P and A modes, slow-rear curtain sync is used to capture both subject and background. Use of tripod is recommended to Slow rear-curtain sync prevent blurring caused by camera shake. Flash Angle The flash angle of the built-in Speedlight can cover the field of view of a 20 mm lens. It may not be able to light the entire subject with some lenses or apertures ( 101). ISO Auto When On is selected for Custom Setting 5 (ISO auto; 142), sensitivity will automatically be adjusted as required for optimal flash output. If a high sensitivity is required, this may result in the background being overexposed when the flash is used at slow shutter speeds (slow sync), in bright daylight (daylight sync), or when the background is brightly lit. 95

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95
Taking Photographs—Flash Photography
Flash Sync Modes
The following flash sync settings are available in
P
,
S
,
A
, and
M
modes:
Description
Flash sync mode
This mode is recommended for most situations.
In
P
and
A
modes, shutter speed will automatically be set to values
between
1
/
60
and
1
/
500
s.
Red-eye reduction lamp lights for approximately 1 s before
main flash, causing pupils in subject’s eyes to contract and
reducing “red-eye” effect sometimes caused by flash.
Ow-
ing to 1 s shutter-release delay, red-eye reduction is not
recommended with moving subjects or in other situations
in which quick shutter response is required.
Do not move
camera while red-eye reduction lamp is lit.
In
S
and
M
modes, flash fires just before shutter closes, creat-
ing effect of stream of light following moving subjects.
In
P
and
A
modes, slow-rear curtain sync is used to capture both
subject and background.
Use of tripod is recommended to
prevent blurring caused by camera shake.
Rear-curtain sync
Slow rear-curtain sync
Combines red-eye reduction with slow sync.
Available only
in
P
and
A
modes.
Use of tripod is recommended to prevent
blurring caused by camera shake.
Slow sync with red-
eye reduction
Flash is combined with shutter speeds as slow as 30 s to
capture both subject and background at night or under dim
light.
Available only in
P
and
A
modes.
Use of tripod is rec-
ommended to prevent blurring caused by camera shake.
Slow sync
Red-eye reduction
Front-curtain sync
Flash Angle
The flash angle of the built-in Speedlight can cover the field of view of a 20 mm lens.
It
may not be able to light the entire subject with some lenses or apertures (
101).
ISO Auto
When
On
is selected for Custom Setting 5 (
ISO auto
;
142), sensitivity will automati-
cally be adjusted as required for optimal flash output.
If a high sensitivity is required,
this may result in the background being overexposed when the flash is used at slow
shutter speeds (slow sync), in bright daylight (daylight sync), or when the background
is brightly lit.