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The mods have done it again. They've deleted my on-topic thread and left up the frogposting threads, so finally here's the answers, from top to bottom:
Full frame+400mm lens+2x TC (f/16, f/8 on the lens)
Crop+400mm lens+2x TC (f/16, f/8 on the lens)
Crop+400mm lens (f/8)
All digital, no film used. For some reason the last one looks a bit like poorly developed film.