TPE helps you plan outdoor photography in natural light.
See how the light will fall on the land, day or night, for any location on earth.

The Photographer's Ephemeris iOS

Our premier app for iOS, TPE offers a rich set of planning tools for landscape, cityscape, outdoor, architectural and night photography. Learn More →

The Photographer's Ephemeris 3D

For landscape photographers shooting in varied terrain, TPE 3D is a unique visualization tool showing sun, moon and night sky against the terrain with simulated lighting and shadows. Learn More →

TPE for Android

TPE for Android offers the essentials for sun and moon photography, plus some handy features such as offline maps and light pollution map overlay. Learn More →

Tpe Web App

Just getting started with TPE? Use our free web app directly in your browser and take your photography planning to the next level. Get Started →

The Photographer's Transit

Photo Transit provides map-based field of view shot planning tools to help you visualize compositions and lens/camera selection. Learn More →

Head and shoulders above the crowd is The Photographer’s Ephemeris.
Odd name, great app.
— National Geographic

Our Partners


Predicting perfect light and color for outdoor photographers, Skyfire helps you know where and when epic light will occur so you won't miss out on that award-winning shot ever again.

Skyfire is available exclusively within TPE on iOS and as a standalone Android app.

More →

Bruce Percy Ebooks

Bruce Percy is one of most distinctive and stylish landscape photographers working today.

We're proud to have co-authored the e-book Understanding Light with Bruce. It is available on Bruce's site.

More →