
Originally Posted by
JemC
Hi Dan
Ha, Ha, This should be fun, me trying to explain something technical,
1st off let me just say that this is my interpretation of it or at least how my brain works it out, i may be totally wrong but you have asked, so i will try my best to answer,
Have you ever looked down a long road on a hot summers day and in the distance you can see the heat haze coming up from the road making it look all shimmering,
when you look through a telescope at the moon or other planets you get the same or similar effect due to the movement of air between you and the moon (atmospheric effect)
there are other things that can cause it but i believe this is the main one, and it gives the impression that the moon is bobbing about,as a result of this if you where to take a single image
of the moon there is a very good chance that it will not all be in focus, it may not be far off but small parts would likely be out of focus or soft due to the atmospheric effect so
to combat this you take a series of images in succession where hopefully you can capture the small areas that were out of focus or soft,in focus,
Once you have all your images you then run them through some software programs to stack them all together, (there are various ones around and most are free to download) after which
you can then process the final image bringing out far more detail than just a single image, (a little like focus stacking only you don't alter your focus point)
hope you were able to follow this explanation,
Regards