TPE for Desktop

TPE for Desktop Web App

About TPE for Desktop

The Photographer’s Ephemeris (TPE) helps you plan outdoor photography shoots in natural light, particularly landscape and urban scenes. It’s a map-centric sun and moon calculator: see how the light will fall on the land, day or night, for any location on earth.

TPE for Desktop is the original – and free – version of the program, and is the premier outdoor photography planning tool used by thousands of photographers, amateur and professional, around the world.

With the new web app, TPE has evolved from its original form, but the core purpose remains the same: to provide an elegant, visual way to plan the natural light of the sun and the moon for your outdoor photography.

Getting Started

You can start using the new TPE for Desktop web app in your browser immediately.

1) Pre-requisites

You’ll need a modern web browser.

We’ve tested in Safari 7.0.5, Firefox 30.0, Chrome 36.0.1985.125, Internet Explorer 11 and Opera 22.0. If you’re stuck with an older version of Internet Explorer, you’ll need to install an alternative, such as Chrome, to use the TPE web app.

Note: if you have your browser configured to block cookies or local storage, the app won’t work properly. Also, ad-blocking, privacy and identity protection add-ons may cause the app to mis-behave, particularly if they block calls to third party sites such as Google Maps.

2) Download the Quick Start Guide

The Quick Start Guide is a free 2-page PDF that gives you an overview of all the key functionality of TPE, plus a reference to the many keyboard shortcuts that are available. If you want to become a TPE power user, we’d recommend familiarizing yourself with the shortcuts!


A 2-page PDF quick start guide to using the TPE for Desktop web app.
File size 272.88kB | Last modified Wed Jul 2, 2014 at 23:45 | Download count 1326

3) Get the eBook

Find out how to get the most out of TPE: Understanding Light is an eBook co-authored with Scottish photographer Bruce Percy that shows you how TPE can be used to plan your landscape photographs. It’s available for sale via Bruce’s web-site and provides the photographic and scientific context you need to understand how and why a tool like TPE can help you achieve your photographic goals.

Note: we are working with Bruce Percy to produce an updated 2nd Edition of Understanding Light, which will cover the new app in detail. We expect the updated eBook to be complete by end August 2014.

We will be offering a free update to the second edition to all existing customers who have previously purchased the book. If you purchase Understanding Light between now and when the update appears, you will receive the 1st edition at the time of purchase and a free update to the 2nd edition when it is released.

4) Jump right in

Other than the pre-requisites above, you can start using the TPE for Desktop web app right away. Just click on the link below:

5) Support TPE

If you find TPE for Desktop useful, please consider making a donation in support of its continued development:

Legacy Adobe AIR app

On 2 September 2014, the Adobe AIR-based version of TPE for Desktop will be (forcibly) retired. Read more here.

We encourage you to export your saved locations and import them into the new web app

For the time being, you can continue to download the Adobe AIR version of TPE:


* IMPORTANT * This software will no longer function as of 2 Sep 2014. We encourage you to switch to the free desktop web app, available at http://app.photoephemeris.com. However, should you wish to download this old version of TPE for Desktop, it is available for Windows and Mac. Please ensure you have the latest version of Adobe AIR installed prior to attempting to install this version of TPE.
File size 2.38MB | Last modified Sat Jul 12, 2014 at 17:26 | Download count 2934

Version 1.1.2 will allow you to export your saved locations even after 2 Sep 2014, however, after that date other aspects of the app will no longer function.

If you currently have an earlier version of TPE installed (such as v1.1.1), you will need to uninstall that version prior to installing v1.1.2. To complete the uninstall procedure, you should re-run the original installer file and select Uninstall.

The v1.1.1 installer is available here:


* IMPORTANT * This software will no longer function as of 2 Sep 2014. TPE for Desktop v1.1.1 is an out-of -date version of the old desktop app and is provided here solely for uninstall purposes. In order to install the later v1.1.2, you must first uninstall v1.1.1. Uninstalling does not delete your saved locations. However, before uninstalling this software, we recommend that you export your locations as a KML file and store this somewhere safe as a backup. You can import the KML file into the later version of TPE for desktop (as well as importing into the new TPE web app). V1.1.1 is available for Windows and Mac. Please ensure you have the latest version of Adobe AIR installed prior to attempting to install TPE.
File size 2.39MB | Last modified Fri Oct 12, 2012 at 23:20 | Download count 146358

Release notes for TPE for Desktop Adobe AIR app are available here.