TTG Plus > FAQs > This is FAQ 13


On P3 of the Trust Test

“One view”

  • 1301. What’s the point of P3?

    P3 ensures that every TTG photograph depicts only “one view,” as per Characteristic #3 of the 9 characteristics of trusted photographs.

  • 1302. But which view is the “one view” if the TTG photographer is allowed to combine multiple exposures, as per P5?

    That is never an issue.

    P3 specifies “no repositioning or re-aiming of the camera or lens between exposures,” and P4 rules out showing multiple scenes if multiple exposures are combined (see FAQ #14).

    See also the Key page on satodes

  • 1303. And the “one view” principle is why P3 also bars the stitching together of successive exposures of different views into a panorama the way smartphones do?

    Yes.

    A stitched panorama made from successive exposures (the way a smartphone makes them) may look like “one view,” but in fact that panorama is the combination of multiple views recorded one after another.

  • 1304. Is it possible to extract a frame from a smartphone panorama and make that frame into a TTG-eligible photo?

    No.

    No photo taken with the “Pano” setting on a phone can ever qualify as TTG, because the combination of different views (the panorama) is disqualified by P3’s “one view” requirement, and because there is no way to isolate a single exposure from that “Pano” combination.

  • 1305. Why does P3 say that everything in the photo has to be “recorded on one device”?

    (P3 is here)

    Because combining views recorded from different perspectives would not satisfy P3’s “one view” requirement.

  • 1306. Why does P3 prohibit using more than one focal length to make a TTG photograph?

    (P3 is here)

    Because different focal lengths provide different magnifications of the subject, and combining those different magnifications into one image is disqualified by P3’s “one view” requirement.

    This prohibition is consistent with rinairs.

  • 1307. What about repositioning or re-aiming the camera during a single exposure?

    Repositioning or re-aiming the camera during a single exposure does not disqualify a photo from P3, but the only scenario in which this is valid is to follow a moving subject—i.e., panning.

    If the panning is not done well enough to keep the moving subject clear, the photo will be too blurred to meet the rinairs requirement in P7.

    TTG's allowance for panning includes use of a star tracker for very slow panning of the sky during night astrophotography, but note that the night photo must be made from a single exposure or it will be disqualified by P3. (Many night star photos are combined with separate exposures of the earthly landscape, which disqualifies them from P3.)

    #1303 above addresses moving the camera between multiple exposures.

  • 1308. Why doesn’t panning disqualify photographs from P3’s “one view” requirement?

    (“Panning” refers to smoothly and continuously re-aiming the camera to follow a moving subject.)

    Because a constant relationship is always maintained between the camera and its view of some part of the moving subject.

    If that relationship isn’t maintained, then the photograph will be too blurred overall to meet P7.

  • 1309. Sweep panoramics are disqualified by P3, but if a vista were photographed by pivoting a camera around and recording a series of photos that are not stitched together but presented next to each other, could the result qualify as TTG?

    Yes, each photograph in such a series would count as “one view” if it is clear they are distinct photographs. Each photograph could qualify for the TTG label.

    But that is only the case if the photos are not joined seamlessly together to imply to viewers that they are seeing a single photograph where there actually is a series of photographs.

    If the series of successive exposures were presented in a way that leads viewers to think it is a single image, it would be disqualified from P3 and from the Trust Test.

  • 1310. What about using a very wide-angle lens to make a single exposure and then cropping it to a long panoramic proportion?

    The resulting image would be eligible to qualify for the TTG label.

    The point of P3’s “no panoramics” statement is to prevent stitching together successive views recorded while moving the camera or shifting the lens between exposures, not to prevent photographs of wide vistas.

  • 1311. Why does P3 stipulate “focus maximization”?

    What is focus maximization? | View P3

    Because a central tenet of reportage photography — the standard on which TTG is based — is that the image presented to viewers cannot show less in focus than the camera recorded.

    Couldn’t a less-strict label be created that allowed blurring undesirable areas of the photo?

  • 1312. When is “optical plausibility” ever going to be an issue?

    Optical plausibility (required by P3) will only be an issue when photographers manually combine exposures that have different focus points.

    (All mass-marketed devices that automatically and instantly combine exposures create optically plausible images.)

    But given the limitations set by P5 — including the difficulty of manually refocusing and shooting multiple photos within a single second — optical plausibility is for now largely a theoretical issue.



See also the “P3” tab on “How undoctored photographs work”

The numbering of the FAQ questions will not change — any new questions are added at the bottom and given new numbers — so users can safely make a link to any specific question.