Quick comparison of three Therm-App cameras and a FLIR SC660
1st image - Therm-App, 384x288, unmodified 9Hz, 19mm lens, Thermviewer, superresolution to 768x576
2nd image - Therm-App, 384x288, 9Hz camera modified to 25Hz, 19mm lens, Thermviewer, superresolution to 768x576
3rd image - Therm-App Pro, 640x480, unmodified 25Hz, 19mm lens, Thermviewer, superresolution to 1280x960
4th image - Therm-App Pro, 640x480, unmodified 25Hz, 35mm lens to give same FoV as 19mm on 384x288 cameras, Thermviewer, superresolution to 1280x960
5th image - FLIR SC660, 24mm lens, x2 upscaled to 1280x960
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6th image - Argus 3, photographed off screen, due to the limitations of the camera's screen this image does not exactly represent the 320x240 resolution of the thermal sensor
7th image - visible light view of scene
Images 1-4 were made with ThermViewer set to its subjectively 'best' settings (essentially the same for all four images) and post-processed in Paint Shop Pro to give a more pleasing greyscale but are otherwise as-shot.