Guide no. [normal flash, Camera’s flash-related exposure warnings – Canon MR-14EX User Manual
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Specifications
Guide No.
[Normal Flash]
(At ISO 100 in meters/feet)
Flash Output
1/1
1/2
1/4
1/8
1/16
1/32
1/64
Guide No.
14.0/46.2
10.0/33
7.0/23.1
5.0/16.5
3.5/11.5
2.5/3.2
1.8/5.9
[High-Speed Sync (FP Flash)]
(At ISO 100 in meters/feet)
Shutter Speed (sec.) 1/125
1/160
1/200
1/250
1/320
1/400
1/500
1/640
Guide No.
7.9/26
7.6/25
7.2/23.7
6.8/22.4
6.2/20
5.5/18.1
4.9/16.1
4.4/14.5
Shutter Speed (sec.) 1/800
1/1000
1/1250
1/1600
1/2000
1/2500
1/3200
1/4000
Guide No.
3.9/12.8
3.5/11.5
3.1/10.2
2.7/8.9
2.4/7.9
2.2Z7.2
1.9/6.2
1.7/5.6
Shutter Speed (sec.) 1/5000
1/6400
1/6000
Guide No.
1.5/4.9
1.4/4.6
1.2/3.9
* The above figures apply to both or only one flash tube firing at a manual flash output of 1/1.
Camera’s Flash-Related Exposure Warnings
Mode
Warning Indication
Description
Remarks
Aperture-priority
AE
Max. sync speed
display blinks.
The background will
be overexposed.
The flash exposure setting for
the subject is correct. Changing
the aperture may stop the shutter
speed display from blinking.
Shutter speed-
priority AE
Minimum aperture
display blinks.
The background will
be overexposed.
Only the flash exposure setting
for the subject is correct.
Maximum aperture
display blinks.
The background will
be underexposed.
Program AE
Minimum aperture
display blinks.
The subject is too
bright.
Attach a neutral-density (ND) filter
to the lens to reduce the amount
of light received by the camera.
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