With a focal length of 600mm (f/7.5), the ED80 apo refractor is wonderfully suited for visual applications on both solar system and deep-sky objects as well as for prime-focus astrophotography and CCD imaging. Its multi-coated 80mm objective doublet contains one element crafted from extra-low-dispersion FPL-53 glass, so images are virtually free of chromatic aberration! At a length of just 24, the ED80 is extremely portable.