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<blockquote data-quote="WayneF" data-source="post: 376557" data-attributes="member: 12496">Re: Can 2 AF assist lamps be used at the same time? (on camera &amp; off camera ext' flasI can believe the YN468 II does TTL.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp; Its manual and specs say it does.&nbsp; Some of the Yongnuo 4xx models did not.The camera menu for flash (that selects Manual or TTL flash mode) is for the cameras built-in flash. This menu is also used for the SB-400 (and 300 and 500) that have no menu themselves, so the camera sees it and this menu then applies to it.&nbsp; But just those. Other flashes have their own menus.So for other flashes, this camera menu has no meaning or effect.&nbsp;&nbsp; If the internal flash door is shut, and the SB-400 is not attached, this camera menu simply does nothing, it is ignored.The camera does meter the exposure for the hot shoe TTL flash.&nbsp;&nbsp; The +/- buttons on the flash are flash compensation buttons.&nbsp; They cause the regular TTL flash power level to be adjusted that way.&nbsp;&nbsp; The camera also has both Flash Compensation and Exposure Compensation (this last one affects both ambient exposure and flash exposure, the first one only affects flash exposure).&nbsp;&nbsp; All of these three add to a final flash compensation (the flash, and FC and EC, they all add).If you have to add -3 EV more, the first thing to do is to make sure what the other two say now.&nbsp; Possibly one of them is not at zero?The way my Nikons work, if any of the three of are not zero, then the top LCD (by shutter button) will show a +/- icon symbol.&nbsp; If that symbol does not show, then all sources of compensation are zero.&nbsp; You can of course also check them individually.Check those first, and then if still an issue, let's dig deeper.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="WayneF, post: 376557, member: 12496"] [b]Re: Can 2 AF assist lamps be used at the same time? (on camera & off camera ext' flas[/b] I can believe the YN468 II does TTL. :) Its manual and specs say it does. Some of the Yongnuo 4xx models did not. The camera menu for flash (that selects Manual or TTL flash mode) is for the cameras built-in flash. This menu is also used for the SB-400 (and 300 and 500) that have no menu themselves, so the camera sees it and this menu then applies to it. But just those. Other flashes have their own menus. So for other flashes, this camera menu has no meaning or effect. If the internal flash door is shut, and the SB-400 is not attached, this camera menu simply does nothing, it is ignored. The camera does meter the exposure for the hot shoe TTL flash. The +/- buttons on the flash are flash compensation buttons. They cause the regular TTL flash power level to be adjusted that way. The camera also has both Flash Compensation and Exposure Compensation (this last one affects both ambient exposure and flash exposure, the first one only affects flash exposure). All of these three add to a final flash compensation (the flash, and FC and EC, they all add). If you have to add -3 EV more, the first thing to do is to make sure what the other two say now. Possibly one of them is not at zero? The way my Nikons work, if any of the three of are not zero, then the top LCD (by shutter button) will show a +/- icon symbol. If that symbol does not show, then all sources of compensation are zero. You can of course also check them individually. Check those first, and then if still an issue, let's dig deeper. :) [/QUOTE]

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