CCD vs Film? Lots of time vs no patience? Alright, this is your place to discuss all the astrophotography what's and what's not. You can discuss about techniques, accessories, cameras, whatever....just make sure you also post some nice photos here too!
Certainly. The barlow acts as a focal length extender, so magnification increases. Stacking barlows is also possible, if your aperture allows it. I've tried stacking two barlows before, but the images were too dim.