TPE. The Photographer's Ephemeris

Sunlight. Moonlight. Starlight. Precision planning for outdoor photographers.

Start planning today

Don’t miss the moment.

The best alignments are rare. The optimal light quickly fades.

Know where to be.

See exactly where the Sun, Moon, and more will rise, set, and move at your location.

Visualize the shot.

See light direction, shadows, and sightlines.

TPE Web App
TPE for iOS on iPhone 17 Pro Max
“Head and shoulders above the crowd is The Photographer’s Ephemeris. Odd name, great app.”
National Geographic's company National Geographic
“One of the most useful apps for any nature photographer.”
Outdoor Photographer's company Outdoor Photographer

Recent Articles

View all →
Architectural Photography, Part 1: Perspective

Architectural Photography, Part 1: Perspective

This is the first in a series of brief introductory articles on architectural photography. We’ll cover everything you need to know in order to plan, execute and process your images of buildings to a high standard. In this part, we’ll consider perspective and how it applies to architectural work.

Read more →
Starry skies over Castle Valley, Utah

New Seeing and Transparency Forecasts

Seeing and Transparency, along with light pollution and smoke, are two of the most important considerations for astrophotographers in determining where and when to plan a shoot. We’re pleased to be offering new Seeing and Transparency forecasts with Photo WX, our weather service for photographers.

Read more →
Total Solar Eclipse, 2017

A Solar Eclipse Glossary of Terms

With April 8 fast approaching, levels of interest in the last total solar eclipse to cross North America in the next 20 years are skyrocketing. There’s a lot of terminology that gets bandied around relating to eclipses, so here’s our guide to some of the main terms you’ll likely encounter.

Read more →
Milky Way over Bear Lake

Key Weather Forecasts for Night Photography

When planning a night photography or astrophotography shoot, the weather is a critical factor. It’s not just the obvious things such as the absence of rain and clouds, but many other factors that conspire to make great conditions, or not.

Read more →
Looking northeast from the nave - light on the north side columns and arches

Architectural Photography, Part 5: Natural Light

Lighting is a critical aspect of architectural photography and something you should plan for in advance. Depending on the circumstances of your project, you may be able to pick and choose your time freely (e.g. personal projects, planning future travel), to exercise some choice within a finite time window…

Read more →

Get started today

The web app is free to use