Free browser tools
Plan the shot before you open the camera.
Use advanced photography planners and practical calculators for sky position, subject framing, exposure, focal length and storage. They run in your browser and do not upload photos or access your camera.
Moon alignment & distant view planner
Map camera and subject positions, calculate distance and bearing, check Earth curvature and find the closest moon direction.
Open map planner ↗ Advanced sky plannerMoon & sun photography planner
Calculate lunar phase, rise and set times, compass direction, sky height, golden hour, blue hour and future bright-moon dates.
Open planner ↗ Advanced framingSubject size in frame visualizer
Preview how large the moon, a bird, aircraft, boat or distant object will appear and how many native pixels cover it.
Open visualizer ↗ Advanced exposureAstrophotography exposure lab
Compare NPF and 500 Rule shutter times, pixel-level star motion, trail duration, sequence time and storage.
Open exposure lab ↗ FramingCamera field of view calculator
Estimate horizontal viewing angle and scene width from sensor size, focal length and subject distance.
Open calculator ↗ Lens comparisonEquivalent focal length calculator
Convert a phone camera's physical focal length and crop factor into a familiar full-frame equivalent.
Open calculator ↗ Zoom planningDigital zoom resolution calculator
Estimate source dimensions, megapixels and sensor area remaining after crop-based digital zoom.
Open calculator ↗ StabilityHandheld shutter speed calculator
Find a starting shutter speed using full-frame equivalent focal length, stabilization and subject movement.
Open calculator ↗ Photo planningPhoto storage calculator
Estimate picture file size, photos per gigabyte and how many images fit in available phone storage.
Open calculator ↗ Video planningVideo storage calculator
Calculate recording size and available minutes from video bitrate, duration and free storage.
Open calculator ↗These are planning and learning tools. They do not take photos, record video, enlarge images or replace the camera controls in ZoomCam. Results are estimates because phones may switch lenses and apply device-specific processing.
Ready to use the plan?
Open ZoomCam on iPhone or Android when it is time to frame a distant subject.