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Why did experts take these photos seriously?
William Hartmann's Condon Report study treated the photos seriously but left the case balanced between a distant object and a suspended model.
On this page
- What Hartmann tested in the negatives
- Why brightness suggested a distant object
- Why the report still left room for hoaxing
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Introduction
The McMinnville photographs gained unusual status in UFO history because they were not dismissed as obvious fakes by the University of Colorado study commonly known as the Condon Report. In 1968, astronomer William K. Hartmann examined the original negatives as part of the Air Force-funded investigation into UFO reports. His conclusion was strikingly cautious: the photographs appeared free of simple photographic trickery, and some of their physical characteristics suggested a distant object rather than a small model. Yet he stopped short of calling them genuine. Instead, he argued that the evidence left two competing possibilities standing — a large object at considerable distance, or a carefully suspended model near the camera. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
That balance is what keeps the McMinnville case important within Oregon UFO history. The photographs were not treated as mere folklore. They became a technical problem involving geometry, lighting, atmospheric effects and the limits of photographic interpretation.
Why did experts take these photos seriously?
Hartmann’s study stood out because it examined the photographs as physical evidence rather than relying mainly on witness testimony. He analysed the negatives, compared the two images, considered possible hoax methods and looked at how light appeared across the scene. His report described the case as one of the few UFO investigations in which the geometric, psychological and physical factors appeared broadly consistent with the witnesses’ account. [Wikipedia]WikipediaMc Minnville UFO photographsMc Minnville UFO photographs
That did not mean he believed the object was necessarily an extraordinary craft. What impressed investigators was that several common explanations seemed weak:
- The negatives did not show signs of ordinary retouching.
- A double exposure did not fit the image characteristics.
- The object appeared consistent between the two photographs.
- The shape did not resemble a spinning thrown object because there was no obvious sign of rotational blur. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
For a government-sponsored UFO study that often rejected photographic claims, that was enough to make the McMinnville images a notable exception.
What Hartmann tested in the negatives
A major part of the investigation involved determining whether the object had been added photographically. Hartmann examined whether the images showed signs of manipulation such as drawing, retouching or optical compositing.
His findings largely ruled out straightforward photographic fraud. The object was darker than the surrounding sky in ways that did not fit a simple double exposure. The negatives also lacked evidence of direct alteration. Because the object appeared in two different positions and perspectives, Hartmann argued that it looked like a real three-dimensional object photographed twice rather than a shape inserted later into the negatives. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
This distinction matters. Hartmann was not saying the object was an unknown aircraft. He was saying that if the photographs were faked, the fake was probably physical rather than photographic. In other words, investigators increasingly focused on the possibility of a small object suspended in front of the camera rather than darkroom manipulation after the fact. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
Why brightness suggested a distant object
The most influential part of Hartmann’s analysis involved photometry — the measurement of brightness in an image.
A common claim about photographs is that they reveal shape but not distance. Hartmann argued that this is not entirely true. Atmospheric effects can alter how distant objects appear. Dust, moisture and scattered light tend to reduce contrast and change apparent brightness, especially on reflective surfaces. Distant mountains, for example, often appear paler and more washed out than nearby objects. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
Hartmann compared the brightness of the alleged UFO with nearby objects visible in the photographs, including a fuel tank on the Trent property. He was particularly interested in the pale underside of the object. If the object’s upper and lower surfaces were made from similar materials, the measured brightness seemed more consistent with something located well beyond the immediate foreground rather than a small model hanging close to the camera. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
This led to the famous distance estimate often associated with the Condon study. Under certain assumptions, the calculations suggested an object perhaps around 1.3 kilometres away. At that distance, the photographed object would have been tens of metres across rather than a small household item. Hartmann therefore concluded that the photometric evidence leaned towards a distant object. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
For supporters of the photographs, this became the strongest technical argument in favour of authenticity.
The weakness in the distance argument
The distance estimate depended on assumptions that could not be independently verified.
Hartmann’s brightness calculations required assumptions about the object’s surface properties, reflectivity and orientation to the Sun. Because nobody knew what the object actually was, those values had to be inferred rather than measured directly. A different surface material or lighting geometry could alter the conclusions substantially. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
This is one reason the analysis never settled the case. The photometry suggested distance only if the object’s brightness behaved in expected ways. Critics argued that a small reflective model could potentially produce misleading brightness values under favourable lighting conditions. The photographs alone could not establish which interpretation was correct. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
In practical terms, Hartmann’s work reduced the range of plausible explanations but did not eliminate them.
Why the report still left room for hoaxing
The most important sceptical observation in the Condon analysis involved the overhead wires visible near the top of the photographs.
Hartmann noted that the object appeared beneath roughly the same point on the wires in both images, despite the camera position changing between exposures. That consistency raised an obvious question: was the object hanging from one of the wires? [Wikipedia]WikipediaMc Minnville UFO photographsMc Minnville UFO photographs
He could not see a supporting thread in the negatives. However, he also could not rule out one. Thin fishing line, thread or wire might have been too small to resolve clearly in the available material. Hartmann therefore left the suspended-model explanation alive even while acknowledging that the photometric evidence pointed in another direction. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
His final summary became one of the most quoted passages in the case. After rejecting several simpler explanations, he concluded that investigators were essentially left choosing between an asymmetric model suspended from the overhead wire and an extraordinary flying object. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
That was a remarkably narrow conclusion for a major UFO study. It neither debunked nor validated the photographs.
How later researchers revisited the same question
The distance debate did not end with the Condon Report. In the 1970s, optical physicist Bruce Maccabee re-examined the negatives and broadly supported Hartmann’s photometric reasoning. He argued that the lighting and density measurements continued to favour a substantial object at some distance from the camera rather than a nearby model. [Wikipedia]WikipediaMc Minnville UFO photographsMc Minnville UFO photographs
Later sceptical researchers approached the problem from the opposite direction. Rather than concentrating on brightness, they focused on geometry. Researchers associated with the IPACO image-analysis project argued that the object’s position and scale fit a small suspended model only a few metres from the camera. They also claimed to detect evidence of a supporting thread using modern digital processing methods. [Ipaco]ipaco.frThe Mc Minnville picturesIpacoThe McMinnville pictures - IPACO.frA deep photogrammetric analysis has been conducted by Bruce Maccabee. Based on physical data obta…
The significance of these later studies is not that they conclusively disproved Hartmann. Instead, they demonstrated how dependent the original distance estimate was on assumptions about lighting and physical properties. Modern critics argued that if a nearby model remained geometrically plausible, then the photometric evidence could not by itself establish great distance. [Ipaco]ipaco.frThe Mc Minnville picturesIpacoThe McMinnville pictures - IPACO.frA deep photogrammetric analysis has been conducted by Bruce Maccabee. Based on physical data obta…
Why the distance question still matters
The entire McMinnville debate ultimately turns on distance. If the object was far away, the photographs become one of the strongest unexplained image cases in Oregon UFO history. If it was only a few metres from the camera, then a suspended model becomes a straightforward explanation.
Hartmann’s Condon Report analysis remains important because it framed that question more clearly than any earlier investigation. He found reasons to take the photographs seriously, especially the brightness measurements and the apparent absence of photographic tampering. Yet he also identified the exact feature that prevented a definitive conclusion: the possibility that the object was hanging beneath the visible wires. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
More than half a century later, the case remains balanced around that same unresolved point. The photographs gained their reputation not because experts proved they showed an unknown craft, but because one of the most prominent scientific UFO studies concluded that the evidence resisted easy dismissal while still leaving room for a carefully staged hoax. [files.ncas.org]files.ncas.orgCondon Report, Photographic Case Studies: Cases 4659Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying…
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Further Reading
Books and field guides related to Why did experts take these photos seriously?. Use these as the next step if you want deeper reading beyond the article.
The UFO Enigma
Explores physical evidence and scientific evaluation similar to Hartmann's work.
The Report on Unidentified Flying Objects
Provides context for official investigations of unusual reports.
Endnotes
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Source: files.ncas.org
Title: Condon Report, Photographic Case Studies: Cases 46
Link: https://files.ncas.org/condon/text/case46.htmSource snippet
59Given the foregoing analysis, one must choose between an asymmetric model suspended from the overhead wire, and an extraordinary flying...
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Source: Wikipedia
Title: Mc Minnville UFO photographs
Link: https://en.wikipedia.org/wiki/McMinnville_UFO_photographs -
Source: ipaco.fr
Title: The Mc Minnville pictures
Link: https://www.ipaco.fr/ReportMcMinnville.pdfSource snippet
IpacoThe McMinnville pictures - IPACO.frA deep photogrammetric analysis has been conducted by Bruce Maccabee. Based on physical data obta...
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Source: youtube.com
Title: The Condon Report | NASA’s Unexplained Files
Link: https://www.youtube.com/watch?v=_W7SqS6UhE4Source snippet
Oldest Most Authentic UFO Photos? - McMinnville UFO...
Additional References
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Source: dailyemerald.com
Link: https://dailyemerald.com/43204/archives/secrets-of-the-sky/Source snippet
Secrets of the SkyMcMinnville, Oregon, hosts UFO Fest, the second largest annual UFO festival... Bruce Maccabee, a physicist known for h...
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Source: reddit.com
Link: https://www.reddit.com/r/UFOs/comments/1ck8tm0/the_mcminnville_ufo_photos_still_mystify/Source snippet
The McMinnville UFO Photos Still MystifyHere is Dr Bruce Macabee's analysis of the photos and history. https... Maccabee thought a blimp...
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Source: facebook.com
Link: https://www.facebook.com/groups/USRemembered/posts/1510077532711275/Source snippet
This is one of the McMinnville (Oregon), UFO photographs...This is one of the McMinnville (Oregon), UFO photographs taken by by a farmin...
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Source: medium.com
Link: https://medium.com/on-the-trail-of-the-saucers/the-classic-mcminnville-ufo-photos-are-70-years-old-5af8c5cf3b11Source snippet
McMinnville UFO Photos Still Mystify | Point of ContactMaccabee argued that the brightness of the object's underside suggested it was at...
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Source: facebook.com
Title: who remembers the ufo sighting in valley in 1996 if it was on the heston and ste
Link: https://www.facebook.com/historicwestpointgeorgia/posts/who-remembers-the-ufo-sighting-in-valley-in-1996-if-it-was-on-the-heston-and-ste/290723307110072/Source snippet
If it...When Sheaffer sent his research and conclusions to William Hartmann, an investigator for the Condon Committee, Hartmann withdrew...
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Source: documents2.theblackvault.com
Link: https://documents2.theblackvault.com/documents/ntis/CondonReport-Complete.pdfSource snippet
Final Report of the. Scienti fj c Study of Un;,dentified Flying Objects condllcted by the 'in:',ers i ty of Colorado under contract to t~...
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Source: unexplained-mysteries.com
Title: mysteries revisited the mcminnville ufo photographs
Link: https://www.unexplained-mysteries.com/news/354261/mysteries-revisited-the-mcminnville-ufo-photographsSource snippet
Mysteries revisited: the McMinnville UFO photographs8 Jan 2022 — Images of an alleged flying saucer taken at a farm in Oregon in 1950 gen...
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Source: hauntedauckland.com
Title: Paranormal New Zealand The Trent Farm Photos
Link: https://hauntedauckland.com/site/trent-farm-photos-analysis/Source snippet
Paranormal New ZealandThe Trent Farm Photos - Analysis12 Jan 2014 — This is the first of two technical and historical papers on The Trent...
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Source: newyorker.com
Title: the enticing mysteries of ufo photography
Link: https://www.newyorker.com/culture/photo-booth/the-enticing-mysteries-of-ufo-photographySource snippet
The Enticing Mysteries of U.F.O. Photography3 Aug 2023 — The resulting images might be the most extensively analyzed U.F.O. photographs i...
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Source: reddit.com
Link: https://www.reddit.com/r/UFOB/comments/16swo04/were_these_old_images_ever_debunked/Source snippet
best UFO photo ever taken after the 1966 Westall...Read more...
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