Fig. 29: I was waiting two hours for an airplane crossing the moon. Once the earth shadow was so high that crossing airplanes would no longer be lit by the sun, I gave up. The iPhone app Flightradar24 is useful for getting prepared. Sometimes airplanes don't have a clearly visible trail. William Optics Zenitstar f=735mm f/7 + Nikon TC-20E II 2x teleconverter. — EXIF: Nikon D850; Δt=1/250 s; ISO 400; 2018-05-24 21:06:13
