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Nikon DSLR Cameras
D7100
Flash Commander Mode - flash too late
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<blockquote data-quote="WayneF" data-source="post: 218753" data-attributes="member: 12496"><p>I am still back on which slave mode? The only way the "commander could trigger the flash early" would be if the flash were incorrectly in SD or SF slave mode, instead of the wireless slave mode that knows how to decipher and respond to the commanders signals. </p><p></p><p>I think you should double check the flash slave mode, make sure you understand how to set it.</p><p></p><p>The commander certainly does flash commands before the shutter opens. It flashes a request for TTL preflash, and the remote flash should comply with preflash. Camera meters that preflash, and flashes a commander signal to set the remote TTL power level. Then the shutter opens, and the trigger signal is flashed, and then the flash flashes fully. The flash trigger mode should understand all of that.</p><p></p><p>A flash in SD or SF slave modes (sometimes called S1 and S2 in other brands, simply a non-commander optical trigger) will trigger at the earliest of all this flashing, at the first flash seen, before the shutter opens, as you describe. This is a very common problem with optical slaves, they cannot work with the commander. The special wireless mode designed to work with the commander should work.</p><p></p><p>Assuming the flash is flashing (early or not), I really cannot imagine any other possibility. Has it ever worked this way?</p><p></p><p>EDIT: As a test of my theory and as a favor to me, try this one time test:</p><p></p><p>Change the camera flash to NOT be Commander mode, but instead to be TTL or Manual flash mode. Does the same slave setting trigger then? If it is actually in the special wireless mode, it will not flash at all. If it is SD mode, it triggers in sync from TTL flash, and if SF mode, it triggers in sync from Manual mode. </p><p></p><p>If it flashes at all, then its slave mode is NOT set right for the Commander. Wireless mode only responds to the encoded signals from the Commander. The other slave modes respond to any flash they see (takes two for SD mode, preflash and final flash)</p><p></p><p>I think that is what you just said?</p></blockquote><p></p>
[QUOTE="WayneF, post: 218753, member: 12496"] I am still back on which slave mode? The only way the "commander could trigger the flash early" would be if the flash were incorrectly in SD or SF slave mode, instead of the wireless slave mode that knows how to decipher and respond to the commanders signals. I think you should double check the flash slave mode, make sure you understand how to set it. The commander certainly does flash commands before the shutter opens. It flashes a request for TTL preflash, and the remote flash should comply with preflash. Camera meters that preflash, and flashes a commander signal to set the remote TTL power level. Then the shutter opens, and the trigger signal is flashed, and then the flash flashes fully. The flash trigger mode should understand all of that. A flash in SD or SF slave modes (sometimes called S1 and S2 in other brands, simply a non-commander optical trigger) will trigger at the earliest of all this flashing, at the first flash seen, before the shutter opens, as you describe. This is a very common problem with optical slaves, they cannot work with the commander. The special wireless mode designed to work with the commander should work. Assuming the flash is flashing (early or not), I really cannot imagine any other possibility. Has it ever worked this way? EDIT: As a test of my theory and as a favor to me, try this one time test: Change the camera flash to NOT be Commander mode, but instead to be TTL or Manual flash mode. Does the same slave setting trigger then? If it is actually in the special wireless mode, it will not flash at all. If it is SD mode, it triggers in sync from TTL flash, and if SF mode, it triggers in sync from Manual mode. If it flashes at all, then its slave mode is NOT set right for the Commander. Wireless mode only responds to the encoded signals from the Commander. The other slave modes respond to any flash they see (takes two for SD mode, preflash and final flash) I think that is what you just said? [/QUOTE]
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Nikon DSLR Cameras
D7100
Flash Commander Mode - flash too late
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