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<blockquote data-quote="WayneF" data-source="post: 494671" data-attributes="member: 12496">Yes, any regular camera flash is incredibly fast at lower power levels, called speedlight.&nbsp; If you have any sort of rotating fan in the house (even a computer exhaust fan), photograph it running fast, with TTL flash, at maybe ISO 400, and flash about 3 feet from the fan. A farther distance requires more flash power, which is not as fast, but is still quite fast.&nbsp; Speedight...HSS requires different trigger actions at the camera (to cause it to become a continuous light).&nbsp; &nbsp; The Yongnuo YN568 has HSS capability, but it will require a camera that can do HSS.&nbsp;&nbsp; Nikon is calling this feature Auto FP, and it is on all the current models higher in price than the D3xxx and D5xxx.&nbsp; (typically, in the past too, same camera models that have the Commander will have HSS, and the Commander can do HSS too, but Commander is not required to do HSS).My point was,&nbsp;&nbsp; HSS is certainly NOT high speed flash, but any regular camera flash is a speedlight which can be high speed flash (at lower power levels).&nbsp; That includes the YN568 when in regular speedlight mode, NOT in HSS mode.&nbsp;&nbsp; Studio flash units excepted, but any camera flashes (hot shoe flashes, and internal flashes) are Speedlights... incredibly fast at low power levels.The YN568 manual, specs, page 66, shows flash duration of 1/200 second to 1/20000 second.&nbsp; Those two numbers mean at full power level and minimum power level.</blockquote>

[QUOTE="WayneF, post: 494671, member: 12496"] Yes, any regular camera flash is incredibly fast at lower power levels, called speedlight. If you have any sort of rotating fan in the house (even a computer exhaust fan), photograph it running fast, with TTL flash, at maybe ISO 400, and flash about 3 feet from the fan. A farther distance requires more flash power, which is not as fast, but is still quite fast. Speedight... HSS requires different trigger actions at the camera (to cause it to become a continuous light). The Yongnuo YN568 has HSS capability, but it will require a camera that can do HSS. Nikon is calling this feature Auto FP, and it is on all the current models higher in price than the D3xxx and D5xxx. (typically, in the past too, same camera models that have the Commander will have HSS, and the Commander can do HSS too, but Commander is not required to do HSS). My point was, HSS is certainly NOT high speed flash, but any regular camera flash is a speedlight which can be high speed flash (at lower power levels). That includes the YN568 when in regular speedlight mode, NOT in HSS mode. Studio flash units excepted, but any camera flashes (hot shoe flashes, and internal flashes) are Speedlights... incredibly fast at low power levels. The YN568 manual, specs, page 66, shows flash duration of 1/200 second to 1/20000 second. Those two numbers mean at full power level and minimum power level. [/QUOTE]

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