Hey, So I've been becoming increasingly more interested in giving some Astrophotography a shot, Especially considering I live in a very rural area with very little light pollution but I have a few questions. I know that generally speaking the wider lenses are preferred for Astro work but I sadly don't have anything that wide, Widest I have is the 20mm F1.7 Panny, Will this be wide enough to get some decent shots? And secondly what sort of aperture and shutter speed am I looking at for giving this a shot? Just trying to get into the right ballpark to save some time when I get a day to set up a shoot. I was wanting to try some shots with and without star trails.