Introducing The Skytracker Pro - iOptrons Next Generation Camera Tracking Device! Upgraded from SkyTracker, the Pro is more compact, small enough to fit on your palm, better precision, silent tracking, it even has a built-in rechargeable power source that runs for up to 24 hours of continuous operation. The improved precision polar scope maintains a fine engraved reticule, now features adjustable illumination with eight brightness levels. Using with iOptron smart phone app, quick and accurate polar alignment is just a joy. The SkyTracker Pro features four tracking rates, 1X or sidereal, 1/2X for sky and landscape, solar and lunar. All 4 tracking rates work in both northern and southern hemispheres. All metal structure with ABS covers Attaches to a camera tripod with 3/8' or 1/4' threads Accepts cameras weighing up to 3 kg (6.6 lbs) Silent tracking for smooth camera motion, perfect for long-term exposures Detachable alt-azi base with fine latitude and azimuth adjusters for easy polar al