I suppose another way to think of it might be to increase the image size itself. Of course, in order to do that, I'd need to increase my focal length... Looking at the data for Saturn in calsky for July 4, 2014, it appears that Saturn and its rings were 41.5" wide at that time. It is 116 pixels wide in this image, so that means each pixel covers about .35". Given that the Cassini division was perhaps less than one arcsecond wide at this point, it would make sense that my image shows it as being about 2 pixels wide. What I gain from this is that increasing the focal length with a barlow would simply blur the lines between contrasting areas, since my telescope has a resolving power of one arcsecond. Thus the result would be no different as if I had simply resized the image in Photoshop. So it does seem, then, that my images might not get too much nicer until I can purchase a larger scope. On a slightly related note, I'm still not quite sure about the function of binning. I've been into the imaging scene for a little over a year now, but binning isn't something I've dabbled into yet.