You can do it photoshop but there are speciality packages written specially for this sort of thing. I think Registax & deep sky stacker are the favourites for astro purposes - and both probably have options for star trails.
__________________
Mike
Pentax K5ii & Panasonic G5 user (with far too many bits to list)
Member of North Essex Photographic Workshop
Also online with PentaxUser.co.uk, Flickr, MU-43, MFLenses...
|