With a 65mm objective design this scope is compact and portable the trailseeker 65 has a zoom up to 48x magnification or 16x at its widest and celestrons proprietary xlt multi coated optics to produce sharp high contrast images with rubber armoured housing that is fully waterproof and nitrogen filled the celestron trailseeker 65 is rugged and durable the dual focus mechanism allows you to get subjects in focus quickly and fine tune the adjustments