National Geographic Field Guide to the Birds of Western North America (9781426203312)

National Geographic Field Guide to the Birds of Western North America (9781426203312)New enthusiasts are flocking in record numbers to the fascinating pastime of birding. National Geographic has been meeting their need for clear and accurate information for 25 years with our million selling Field Guide to the Birds of North America. Now, to better serve the expanding market, weve customized our field guide format to offer unique coverage for birders east or west of the Rocky Mountains. These new volumes deliver in depth information on

17 arc seconds Transmission Synchronous belt Latitude adjustment range*** 0° ~ 60° Azimuth adjustment range ± 6° Polar Scope iPolarTM electronic polar scope Level indicator Level bubble Hand Controller Go2Nova® 8409 with ~212

Including all the needed spacers and adapters are included for most common imaging configurations

easier to connect to the equatorial mounts and accessories

It can be used

star atlas software

Equatorial wedge for easier polar alignment

Version QFocuser（Standard Version） QFocuser（High Precision Version） Body Size/mm About 43*39*50 About 43*39*50 (excluding the button） Weight About 210g About 265g Motor Reducing motor Non-reducing motor Backlash It has some backlash

We even reduced power consumption

1 ") Weight: 1

The extension tubes can be connected to the eyepiece for visual observation instead of the diagonal

Auto Focus

the High Precision QFocuser is equipped with a non-reducing motor