MuonPi is a community research project to run Muon detectors at home to record measurements. They sent up a high altitude balloon in November 30, 2022 to record the Muon count at high elevation. I couldn’t find details on the camera of lens but it appears to be a GoPro or similar camera.

Flat earther “OUrSeasonIsOver” @Jonatha44733732 tweeted a short video of cherry picked clips from the video that only show parts of the video where the horizon is below the center of frame. This causes the curve of the horizon to be negated by the curve introduced by the lens. The first frame of the video shows that the camera is adding distortion looking at the sidewalk.

Flat earthers are willing to lie to support flat earth.