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max flash sync speed
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<blockquote data-quote="WayneF" data-source="post: 383556" data-attributes="member: 12496"><p>It will work, at least if your flash can do HSS. What flash are you using? The internal flash cannot do it, which I suspect may be your meaning, why you don't see it work. SB-300, 400 cannot do it either. SB-600, 700, 800, 900 can do it. See the manual chart just above.</p><p>(The internal flash can be commander to control HSS flashes at fast shutter, but the internal contribution must be turned off).</p><p></p><p> Auto FP is specifically to allow shutter speeds faster than the 1/250 sync speed. Just turn the dials, wider aperture in camera A mode (a shutter speed will never go very fast if not in bright light though). Or just set faster shutter in S mode or M mode. </p><p></p><p> If in P mode, it sets both, but P mode with flash will try its best to never go faster than sync speed (because HSS is not such a hot deal. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> ) You might be seeing that, but you can spin the shutter dial to force P mode into HSS mode.</p><p></p><p>This Auto FP mode (when the shutter is actually faster than the Auto FP menu) becomes continuous light, which eliminates sync requirements, but it reduces flash power to about 20% which reduces range. This can be very noticeable. It should be able to do fill flash in bright sun up to about 10 or 12 feet.</p><p></p><p>There would be zero advantage of using this HSS mode indoors (in dim light). The regular speedlight mode will run circles around it in all respects, power, speed, range.</p><p></p><p>The mode does allow a faster shutter in bright light though, mostly for the purpose of shooting portraits at f/2.8 at 1/3200 second in bright sun (if that is a goal). A major thing is that now the continuous HSS flash also equivalent exposures, exactly like sunlight now (continuous light).</p><p></p><p> Or the mode simply could provide a faster shutter speed in bright light, but the short range rules out many sports situations for that. In dimmer light, the flash is much faster than the shutter speed anyway.</p></blockquote><p></p>
[QUOTE="WayneF, post: 383556, member: 12496"] It will work, at least if your flash can do HSS. What flash are you using? The internal flash cannot do it, which I suspect may be your meaning, why you don't see it work. SB-300, 400 cannot do it either. SB-600, 700, 800, 900 can do it. See the manual chart just above. (The internal flash can be commander to control HSS flashes at fast shutter, but the internal contribution must be turned off). Auto FP is specifically to allow shutter speeds faster than the 1/250 sync speed. Just turn the dials, wider aperture in camera A mode (a shutter speed will never go very fast if not in bright light though). Or just set faster shutter in S mode or M mode. If in P mode, it sets both, but P mode with flash will try its best to never go faster than sync speed (because HSS is not such a hot deal. :) ) You might be seeing that, but you can spin the shutter dial to force P mode into HSS mode. This Auto FP mode (when the shutter is actually faster than the Auto FP menu) becomes continuous light, which eliminates sync requirements, but it reduces flash power to about 20% which reduces range. This can be very noticeable. It should be able to do fill flash in bright sun up to about 10 or 12 feet. There would be zero advantage of using this HSS mode indoors (in dim light). The regular speedlight mode will run circles around it in all respects, power, speed, range. The mode does allow a faster shutter in bright light though, mostly for the purpose of shooting portraits at f/2.8 at 1/3200 second in bright sun (if that is a goal). A major thing is that now the continuous HSS flash also equivalent exposures, exactly like sunlight now (continuous light). Or the mode simply could provide a faster shutter speed in bright light, but the short range rules out many sports situations for that. In dimmer light, the flash is much faster than the shutter speed anyway. [/QUOTE]
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