TTG Plus > FAQs > More on FAQ #1402 {do another read-through}

Changes in the scene or lighting during exposure


Eligible for TTG:

  • 1. If whatever is being photographed has change or motion in it,

    . . . then the surest way to make a TTG photo of it is with a single uninterrupted exposure (with no more than one flash burst; see #4).

    Note that the length of the single uninterrupted exposure may be limited by the sasibe and satode standards.

  • 2. But if the photographer wants to combine exposures,

    . . . then the surest way to make a TTG photograph is to have no change or motion present in the scene AND to not use successive flash bursts fired from multiple directions (see #3 below).

    Anything else is likely to produce a visual effect that conflicts with the four requirements in the last paragraph of P4.


    • Disqualified by TTG:

  • 3. Successive flash bursts are fired from different directions

    The photo cannot qualify as TTG because it will depict “an appearance that no one present at the scene would have seen,” contrary to the satode requirement of P4.

    The same principle also disqualifies light-painting.

  • 4. Successive flash bursts are fired during the exposure and there is movement in the subject

    The photo cannot meet P4 (it will exhibit ghost objects or SMP effects).

    This is true even when the flash bursts are all fired from one position.