Moving subjects

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  What is this page about?

  “P4 reassures viewers that if there were moving objects in the scene, in a TTG-qualified photograph those objects won’t be rendered in any way other than frozen still, blurred, or invisibly.” (Source)
  

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  1. Motion-related effects allowed by TTG

  A. Depicting motion blur caused by movement in the relationship between camera and subject (although the result must meet the sasibe standard as per P4, P5, and P7)
  
  B. Completely “freezing” a moving object so it looks like it is standing still
  
  C. Rendering invisible any fast-moving objects that qualify for invisible rendering under the sasibe standard (a speeding bullet, spinning wire spokes on the wheels of a bicycle traveling at high speed)
  
  D. Panning the camera to follow a moving subject, rendering the subject more or less “frozen still” but the background motion-blurred
  
  E. Use of a star tracker to prevent motion blur in astrophotography (star-tracking is just a slow version of panning, as per “D” above)
  
  F. Showing the effects of routine camera shake (unless the blur is so excessive that the photo cannot meet the sasibe standard, as per P7)
  
  G. Using image stabilization, tripods, gimbal stabilizers, and other common methods of reducing camera shake
  
  Anytime a motion-related effect fully meets the Trust Test but still might be baffling to viewers, a photographer using the TTG label can add an “IC” alert to the label and add a * pointing to additional explanation if warranted. (#3 here explains why TTG photographers would do this.)
  
  

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  2. Motion-related effects disqualified by TTG

  A. Rendering moving objects as less visible than is determined by the sasibe standard (P4, P5, P7)
  
  B. Showing multiple distinct positions of moving objects (because the result depicts more than “one scene”; see P4) regardless of how the effect was accomplished.
  
  C. Showing any “ghost objects” (again because of P4).
  
  D. Depicting any apparent motion blur that was not caused by movement in the relationship between the subject and the camera (disqualified by P7).
  
  (The next three disqualifying actions are specific examples of “D”)
  
  E. Zooming the lens during the exposure (because of P3, the resulting image is considered TTG-ineligible and cannot qualify as TTG no matter how it is processed or labeled)
  
  F. Using a “motion-blur filter” on the front of the lens during the exposure; the resulting image is considered TTG-ineligible and cannot qualify meet P7 (or qualify as TTG) no matter how it is processed or labeled
  
  G. Adding artificial motion blur to the image after the picture is taken (disqualifies the photo from P2, P7, and from TTG)