50% Illuminated Moon

I’ve usually captured the Moon when it’s been full or near full, and I’ve always wanted to capture it at 50% illumination.lux-standart.ru

The other night, I had a free night at home, the sky was clear and I was finally able to spend some time setting up my EQ6 mount and ED80 to capture the Moon shot I wanted. Click the image to see the beautiful sharp detail.

– Also available as a Wallpaper

Captured with an ED80 telescope and Canon 6D, at a focal length of around 900mm. The seeing was changing rapidly, so I took 90 shots in a very short period of time, and used Registax software to pick the ‘best’ frames out of those. The best 30 frames were stacked together to reduce noise, and processed using Registax and Photoshop.

Canon 6D, ISO400, 1/60s exposure.

To show how the seeing can effect the image, here’s 2 shots from the 90 – one in good seeing and one in bad – cropped at 100%.

Our atmosphere has a dramatic effect on the sharpness of images, and this is a perfect example.

Both images were taken within a minute of each other with the same settings. The image at the top is soft and blurry – the features aren’t sharp. The image at the bottom is much sharper. The craters and mountains are more clearly defined.

We call that “seeing”. When the seeing is good, you get many more images like the bottom one in any given period of time. When the seeing is bad, you get soft and blurry images like the top one.

It’s that ‘seeing’, the effect of the atmosphere, that causes stars to twinkle. The ‘seeing’ doesn’t really effect wide-field imaging, but when you want to do high-resolution imaging of the Moon, Planets or distant objects outside our Solar System that you need ‘good seeing’ to get sharp images.

Thanks for looking.

Tags: , ,

Leave a Reply

Powered by Beyonds Group.