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Can Rear Curtain Sync (Second) Cause Soft Portraits To Be Soft?
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<blockquote data-quote="WayneF" data-source="post: 112763" data-attributes="member: 12496"><p>Rear curtain sync just fires the flash duration at the end of the shutter duration, instead of at the beginning. (and, it allows slow shutter for ambient in camera A and P mode, since Rear Curtain is about a slow shutter).</p><p></p><p>If the flash and shutter speed (for ambient light) are fast enough to stop all blur, it does nothing.</p><p></p><p>If the shutter speed is slow (we're usually talking well slower than say the 1/60 second Minimum shutter speed with flash), so that the ambient causes a long blur trail, then firing the flash at the end of long blur makes stopped image lead the blur, so it looks natural. If you fired the flash at the start of the blur, the stopped image trails the blur, does not look natural. If you have no blur trail, it really does not matter when you fire the flash.</p><p></p><p>Just saying, Rear Curtain sync will not affect the presence of any blur (which is determined by shutter speed and ambient light). Rear Sync merely positions the stopped flash image at the end of this blur, instead of at the start of it.</p></blockquote><p></p>
[QUOTE="WayneF, post: 112763, member: 12496"] Rear curtain sync just fires the flash duration at the end of the shutter duration, instead of at the beginning. (and, it allows slow shutter for ambient in camera A and P mode, since Rear Curtain is about a slow shutter). If the flash and shutter speed (for ambient light) are fast enough to stop all blur, it does nothing. If the shutter speed is slow (we're usually talking well slower than say the 1/60 second Minimum shutter speed with flash), so that the ambient causes a long blur trail, then firing the flash at the end of long blur makes stopped image lead the blur, so it looks natural. If you fired the flash at the start of the blur, the stopped image trails the blur, does not look natural. If you have no blur trail, it really does not matter when you fire the flash. Just saying, Rear Curtain sync will not affect the presence of any blur (which is determined by shutter speed and ambient light). Rear Sync merely positions the stopped flash image at the end of this blur, instead of at the start of it. [/QUOTE]
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Can Rear Curtain Sync (Second) Cause Soft Portraits To Be Soft?
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