Moon 4 days old and 19,5% lit
This image of the moon was captured using the Lucky Imaging method;
• First a video is recorded with as many frames per second as possible – in the case of this moon image, a video of 4-5 minutes at about 12 fps was captured
• Then the individual frames are extracted and ordered by quality
• The best frames are then stacked – in this case, I chose the top 25% which came to 873 frames
• Finally the stacked images is sharpened and some noise reduction is added too
Opposite to deep sky imaging where long exposures are used, the solar system bodies are much too bright for long exposures, and thus a shorter exposure is needed.
However with shorter exposures the blurring effect of the constantly moving atmosphere is very obvious and the resulting image is rarely sharp.
With the Lucky Imaging method, recoding a high speed video, there’s always some frames where the atmosphere moved less and thus some of those frames will be sharp – and by analysing the many subframes of a video, it’s possible to identify and stack only the best quality frames!
I think this image could have been even sharper – by choosing a much faster frame rate – but I forgot to check that setting on the camera… 🙄
So I will make sure not to forget that part next time! 😄