Celestron Sky Map and Planisphere D800 Its 5000 mAh battery provides

Its 5000 mAh battery provides up to 6 hours of continuous heat up to 45°C (114°F)

inner focusing autofocus (AF) system

75mm pitch thread) is specifically designed to attach Cokin's "P" series filter holder to lenses with a 52mm filter thread

Focal length with TLS APO (mm): 750-1500

Celestron Sky Map and Planisphere D800 Its 5000 mAh battery providesGlow in the dark planisphere tells you which constellations are up for any date or time, and at a moments notice! Seasonal star charts display the locations of the best deep sky objects for summer, winter, spring, and autumn Heavy card stock with a protective overcoat holds up to years of use Plastic spiral binding lets star charts lay flat For use in the Northern Hemisphere only