The TB3 is moving during my exposure

This can happen for a few reasons:

1. Make sure your cameras shutter speed is set less than your TB3′s static time.
2. Make sure your cameras shutter speed is set less than your TB3′s interval time
3. In general, understand the shot cycle – the TB3 is smart, but needs your help to program it correctly. Your camera’s exposure time, the TB3′s intervals, and Static time are interrelated in a tightly choreographed dance we like to call – The Anatomy of a Single SMS Frame – Check it