One method is to capture a large number of short exposure images, either video (AVI) or multiple still images (jpegs).
A distance scale on a lens, or a camera that reads out focus distance, or a laser rangefinder, etc).
Registax is free, and I believe Avistack is also.I would like to find out as my girlfriend loves everything astronomy.And what is the best aperture to use?First off planets have an incredibly small angular size (measured in arc seconds).5) Please be aware that focus stacking is best suited to static subjects.I have not been able to find anything that runs directly on MacOS that produces nearly as good of results, or is nearly as easy to use (for this task).Yet its so easy to use that anyone can have a go at focus stacking.For stacking, I use CombineZP on.2) For quality focus stacking software, audio converter full version windows 7 try Zerene Stacker, m/stacker/ 3) Youll need a camera that enables you to manually adjust focus and aperture, and a way to measure distance (e.g.I am reasonably certain there is not currently any free (in either sense) software for stacking that runs directly on MacOS and is anywhere close to as good as CombineZP.Even details that are not apparent on individual frames will become visible.
In effect you just keep the best images with the best resolution and discard the blurry ones. Here's a couple of examples of a stacked image of the Moon.Paulpci wrote: If I may ask a rudimentary question: what is the purpose/goal of stacking astrophotography photos?The photographer then chooses a quality limit, beyond which any lower quality images are excluded from further use.FocusStacker is designed for use in landscape and architectural photography.This process also works well on the Moon - even better since it has a much larger angular size, 1/2 degree.The result is that the noise of each image, being random, tends to average out to be zero, while image details (which are always in the same location - not random) tend to be reinforced.CombineZP should run fine on an Intel Mac (after you get rid of OS/X and install Windows).Note: 1) FocusStacker is not designed for and is NOT suitable for close-up or macro photography.The largest planet, Jupiter is around 45 arc seconds -.013 degree!