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220EX Speedlite : How to use the AF-Assist Beam and what is its coverage
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The Speedlite 220 EX AF- Assist beam is emitted automatically to enable precise autofocus under dim light and low contrast conditions. The AF-Assist beam is effective from 1 to 5 meters (3.3 to 16.4 feet)
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430EX Speedlite : How to use the AF-Assist Beam and what is its coverage
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Under low-light or low-contrast conditions , the built-in AF-assist beam will be emitted automatically to make it easier to autofocus. The 430 EX's AF- assist beam is compatible with the AF points of almost all EOS cameras. The AF-assist beam is compatible with 28mm and longer lenses.
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380EX Speedlite : How to use the AF-Assist Beam and what is its coverage
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Depending on the camera and the active focusing point, either the camera's AF-assist beam or he Speedlite's AF-assist beam is emitted. Speedlite 380 EX's AF- assist beam is linkable only to the center focusing point. If the camera has only one focusing point (AF frame) the Speedlite's AF-assist bean is emitted.
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QuickGuide to Speedlite 600EX-RT Radio Wireless Flash Setup
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5. Confirm wireless link. Confirm that the <LINK> lights on the 600 EX -RT’s are lit and green and that the AF- assist beam emitter on the receiver is blinking at 1-second intervals. Also confirm that the red flash ready light is lit on the sender unit.
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Specifications of the 550EX Speedlite.
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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
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MR-14EX : How to turn on the Focusing Lamps.
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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.
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List of custom functions available on the 430EX Speedlite.
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C.Fn-04 AF- assist beam OFF 0
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The camera show E in Creative Zone when using the 580EX II
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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,
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How to set and use the Custom Function Settings "C.Fn" on the 430EX II Speedlite
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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.
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580EX II Speedlite : How to set and use the Custom Function Settings "C.Fn"
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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
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