I've decided to challenge myself to photograph the thinnest possible crescent Moon.
I already have a photo of the crescent Moon at 16% of the Earth facing side illuminated by the Sun here in my Astrophotography gallery, but I've seen the Moon just before and just after the New phase where it was far thinner.
The reason why I consider this a personal challenge is the odds are really against me.
- First, the Moon's percentage illuminated changes roughly 5% per day around the time of the New Moon.
- Second, The Sun and Moon are in close proximity meaning as the crescent becomes thinner it becomes ever more washed out by the bright Sunlight.
- Third weather and astronomical seeing conditions are critical, a whisp of light cloud in the wrong location is all that needed to eliminate the days photo opportunity.
- Fourth, I have only two days each lunar cycle which are prime with two secondary.
- Fifth, the the actual time of the New Moon can render the best fine crescents impossible to photograph.
Weather conditions in August eliminated that opportunity and the evening of September 19th was ruined by cloud cover. Yesterday, I lucked out and was able to shoot this 7% crescent Moon just before it set:
Golden Moon
Just 5 minutes later, as the Moon sank behind ever thinker atmosphere, this was the result:
Crimson Moon
Both were shot through my Sigma SD14 through my Orion 1250mm ( 90mm Ø ) Maksutov Cassegrain, f/13.9, ISO 400. I have more details in the descriptions on the photo's web pages, just click the images to go to the links.