Star Trail Planner
Place the celestial pole on your frame. Preview trail length, inter-frame gaps, frame count, duty cycle and storage.
Plan a sequence →Before the shutter opens
Plan the night with visible assumptions
Each tool works in this tab, keeps the inputs in the shareable URL fragment, and shows the units and limits behind the answer.
Milky Way Exposure
Compare full NPF, simplified NPF, 300 and 500 rules, including predicted motion on your actual sensor.
Compare exposures →ND Filter
Calculate exact stops, filter factor, optical density and neighbouring practical choices for stills or video.
Choose a filter →The next planning layer will add Moon/twilight dark windows and a real-sky camera direction model. It will not ask for location until you explicitly choose to use it.