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Photography

Third Night of Comet A3, with Constellations

Each night photographing Comet A3 has presented its own challenges. On this evening, the problem was focus. On the prior two evenings I was able to easily leverage the Moon to get decent focus. However, on this night the Moon was still well-hidden in my East sky.

What saved the night were all the airplanes going in, out, and around O’Hare International Airport. The planes are not exactly infinity focus, but they are sufficiently distant to get the needed focus into the right ballpark. This article’s accompanying picture was taken after focusing the lens on a plane.

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