#1. "RE: hey guys need some direction or clarification ...." In response to Reply # 0
Seattle, WA, US
The two slow sync settings (front and rear) are used to let in more ambient light into the background of your flash photo. The shutter will stay open longer as metered to get the background while the flash fires a short burst to fully light up your subject.
The difference between the two settings is when the flash fires. "Slow Sync" will fire the flash at the start of the exposure while "rear sync" will fire it at the end of the exposure. "Rear sync" is often the better choice because if the subject moves during the longer exposure, the flash will fire at their final location instead of their starting location.
---------+---------+---------+---------+ Joseph K Seattle, WA, USA