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Message: <blockquote data-quote="WayneF" data-source="post: 112754" data-attributes="member: 12496">No, rear curtain sync cannot cause images to be soft. Except, rear curtain sync will allow slow shutter speeds in dim light, and slow shutter speed could hurt sharpness, but you said 1/200 second, so no, there is no effect from rear curtain sync.Rear curtain sync is pointless except at very slow shutter speeds, when you want the intentional slow blur to trail the motion instead of leading it.  But it will have no effect at faster shutter speeds, and won't hurt.See <a href="http://www.scantips.com/lights/flashbasics5.html" target="_blank">Four Flash Photography Basics - Rear Curtain Sync, color filters</a></blockquote>