3322, SkyTracker Pro Camera Mount with Polar Scope Include: SkyTracker TM Pro camera mount Alt-azi base (installed) AccuAlign TM dark field illuminated polar scope Brass 3/8" and 1/4" threaded ball head mounting post (installed) Padded carry bag Micro USB charging cable Upgraded from SkyTracker TM , 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 our smart phone app, quick and accurate polar alignment is just a joy. The SkyTracker TM 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. We have also added a quick slew mode with both forward and reverse to help quickly reframing your image without disrupting the cameras position. We have made big improvements on the SkyTracker TM Pro's removable alt-azimuth base, which features a precision bubble level, degree markings for the altitude and a built in post for the azimuth control. You can also mount the SkyTracker TM Pro head (without the base) directly to any standard photographic tripod with 1/4" or 3/8" threads. The SkyTracker TM Pro is certainly a must have tool for any photographer interested in astroscape or wide field astrophotography.