IncidentMcMinnville (Trent) Photographs (11 May 1950)

On the evening of 11 May 1950, at approximately 19:30 local time, Evelyn Trent, a farmer’s wife on a small property outside McMinnville, Yamhill County, Oregon, observed a metallic disc-shaped object approaching from the northeast. She called her husband Paul Trent, who retrieved his Universal Camera Corporation Roamer I 120-format folding camera and exposed two frames of the object as it passed overhead. The Trents developed the film locally and showed the prints to family; word reached the McMinnville Telephone Register, which published the photographs on 8 June 1950. Within days the photographs were reproduced nationally, including in Life magazine on 26 June 1950.

The Trent photographs are among the most-analyzed UFO images of the 20th century. They were one of two cases (alongside the 1965 Heflin photographs) endorsed by the Condon Committee’s photo-analysis section (1968) as “having all the appearances of being authentic photographs of an extraordinary flying object.” Condon Committee investigator William K. Hartmann (planetary scientist, University of Arizona) wrote of the case: “This is one of the few UFO reports in which all factors investigated, geometric, psychological, and physical, appear to be consistent with the assertion that an extraordinary flying object, silvery, metallic, disk-shaped, tens of meters in diameter, and evidently artificial, flew within sight of two witnesses.”

Skeptical re-analyses have disputed Hartmann’s conclusion. Robert Sheaffer, in The UFO Verdict (1980) and subsequent papers, argued that the photographic geometry — particularly the position of the object relative to overhead power lines visible in the second frame — is more consistent with a small model suspended on a string than with a large object at distance. Sheaffer’s argument turned on the apparent distance from overhead wires: a hoax model suspended below the wires would produce the geometry observed, while a large object at the cited distance would not. Optical physicist Bruce Maccabee (USN, PhD), in extensive subsequent photoanalytic work (1976, 2009), defended the photographs as genuine, arguing that Sheaffer’s wire-position analysis was based on incorrect assumptions about the camera lens focal length and frame geometry.

The Trent family — Paul and Evelyn, neither of whom had any prior or subsequent interest in UFO matters and neither of whom profited from the photographs — maintained the genuineness of their account until their deaths (Paul Trent in 1998, Evelyn Trent in 1997). The original Roamer I camera and the original negatives have been the subject of repeated analysis. The case stands at one of the field’s longest-running and most technically detailed analytical debates; what stands is that the Condon Committee endorsed the photographs, that Sheaffer and Maccabee — both PhD-credentialed analysts on opposite sides — have not converged, and that the Trent family never recanted.