On July 27th 2018 there was an opportunity to photograph a somewhat interesting celestial event: The longest lunar eclipse of the century with the total phase lasting a whopping 103 minutes. I didn’t think much of it at first, after all, how can it be much different to a waxing or waning moon, except that it happens in a very short amount of time (hours instead of days and weeks)? I checked Google Images to make sure my assessment was spot-on and – was proven wrong.
My initial assumption was, that the typical image would be a single reddish (“blood”) moon, but I hadn’t taken into account that recording the individual phases and displaying them in a single image in kind of a “multiple exposure photograph” would be that powerful. That was on July 26th, the day before the event, which left me little time for preparation – but I was determined to give it my best try anyway.
So I took some shots that same evening to get an idea of how to go about it. It turned out that the best way to approach this was to take a picture every 5 minutes and that the actual challenge was to get the exposure right, that is without blowing out any of the 3 colour channels. With the moon never changing phase this wasn’t a problem, however; all I had to watch out for was the sky getting darker with each picture taken.