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<blockquote data-quote="WayneF" data-source="post: 678186" data-attributes="member: 12496"><p>Auto FP 1/250 means that the camera <strong>only does HSS when the shutter speed is FASTER than 1/250</strong>.</p><p>If 1/250 or less, the HSS flash does regular speedlight mode, NOT HSS.</p><p></p><p>Your trigger spec of 1/250 says it does not sync faster than 1/250. </p><p>Even if it did sync faster, it still has to be able to pass the HSS camera commands, and it would have to have specs describing that it could do that, and was compatible with HSS.</p><p></p><p>You could do HSS using the camera commander, but bright sun and distance can be a problem for it (and distance is always a problem for HSS anywhere). To use HSS, you must disable the camera commander group for the internal flash (disable by setting group mode "- -"), because the camera internal flash cannot do HSS... but it can be commander for remote HSS.</p><p></p><p>Forget HSS, and just do regular speedlight flash mode (at up to 1/250 second), and you will have no problem.</p><p></p><p>HSS really only has one virtue. It can allow fast shutter speeds, which in turn allows wide f/stops (like f/2.8) outdoors in bright sun. Indoors, this is absolutely no issue at all, and frankly, HSS has to be the worst possible choice indoors.</p><p></p><p>For any other use, and especially for indoor flash, <strong>regular speedlight mode runs circles around HSS, </strong>in speed, power, and range. And Auto FP defaults to regular speedlight mode until the shutter speed is faster than 1/250 sync speed.</p><p></p><p>HSS is NOT fast flash, it is the slowest possible flash, totally incapable of stopping any motion. HSS is merely fast flash sync, allowing fast shutter speed, but regular speedlight mode can be faster than any shutter speed (called speed lights).</p><p></p><p><a href="https://www.scantips.com/lights/flashbasics2b.html" target="_blank">https://www.scantips.com/lights/flashbasics2b.html</a> describes HSS, what it actually does.</p><p></p><p>EDIT: I see now that you have mentioned sunlight is your use. ISO 100 allows 1/250 at f/11 in brightest sun with speedlights, which ought to do the job. Shade would make it even easier (wider aperture).</p></blockquote><p></p>
[QUOTE="WayneF, post: 678186, member: 12496"] Auto FP 1/250 means that the camera [B]only does HSS when the shutter speed is FASTER than 1/250[/B]. If 1/250 or less, the HSS flash does regular speedlight mode, NOT HSS. Your trigger spec of 1/250 says it does not sync faster than 1/250. Even if it did sync faster, it still has to be able to pass the HSS camera commands, and it would have to have specs describing that it could do that, and was compatible with HSS. You could do HSS using the camera commander, but bright sun and distance can be a problem for it (and distance is always a problem for HSS anywhere). To use HSS, you must disable the camera commander group for the internal flash (disable by setting group mode "- -"), because the camera internal flash cannot do HSS... but it can be commander for remote HSS. Forget HSS, and just do regular speedlight flash mode (at up to 1/250 second), and you will have no problem. HSS really only has one virtue. It can allow fast shutter speeds, which in turn allows wide f/stops (like f/2.8) outdoors in bright sun. Indoors, this is absolutely no issue at all, and frankly, HSS has to be the worst possible choice indoors. For any other use, and especially for indoor flash, [B]regular speedlight mode runs circles around HSS, [/B]in speed, power, and range. And Auto FP defaults to regular speedlight mode until the shutter speed is faster than 1/250 sync speed. HSS is NOT fast flash, it is the slowest possible flash, totally incapable of stopping any motion. HSS is merely fast flash sync, allowing fast shutter speed, but regular speedlight mode can be faster than any shutter speed (called speed lights). [URL]https://www.scantips.com/lights/flashbasics2b.html[/URL] describes HSS, what it actually does. EDIT: I see now that you have mentioned sunlight is your use. ISO 100 allows 1/250 at f/11 in brightest sun with speedlights, which ought to do the job. Shade would make it even easier (wider aperture). [/QUOTE]
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