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CMS-XML Explanation of AF assist beam operation
CMS-XML 220EX Speedlite : How to use the AF-Assist Beam and what is its coverage
How to use the AF- Assist Beam and what is its coverage
CMS-XML Specifications of the 550EX Speedlite.
Direct- sync, shoe-mount flash with E-TTL/TTL autoflash control and wireless transmission/reception (E-TTL preflash, AF- assist beam, auto zoom, and bounce flash). Compatible Cameras
CMS-XML MR-14EX : How to turn on the Focusing Lamps.
In low-light or when the viewfinder image gets darker at high magnification, it becomes difficult to achieve correct focus. In such cases, the focusing lamp can assist with focusing.
CMS-XML List of custom functions available on the 430EX Speedlite.
C.Fn-04 AF- assist beam OFF 0
CMS-XML The camera show E in Creative Zone when using the 580EX II
If "AF- assist beam 0FF" is set with the Speedlite or camera, the AF assist beam will not be emitted . With Type-B cameras, even if .Fn-05-0 is sat, E-TTL II / E-TTL autoflash will not work,
CMS-XML How to set and use the Custom Function Settings "C.Fn" on the 430EX II Speedlite
Custom Function Settings C.Fn-02-113: Convenient when you want to use the depth-of-field preview button to check the depth of field. C.Fn-08: If the Speedlite or camera's AF- assist beam is disabled, the AF- assist beam will not be emitted.
CMS-XML Reset C.Fn-5 is set to 0 (E-TTL).
With Type-A cameras, if C.Fn-05-1 is set, wireless autoflash shooting will not be possible If "AF- assist beam OFF" is set with the Speedlite or camera, the AF- assist beam will not be emitted. With Type-B cameras, even if C.Fn-05-0 is set, E-TTL II/E-TTL autoflash will not work
CMS-XML Specifications of the 430EX Speedlite.
For high sync speed (EF flash): Approx. 2.3-39.4 ft./0.7-12m AF Assist Beam
CMS-XML QuickGuide to Canon 320EX Speedlite Features
The mode you choose will depend mainly on the balance you prefer between the flash exposure and ambient light exposure. Longer shutter speeds will allow longer ambient light exposures to help prevent dark backgrounds;