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.

Created for photographers by a photographer in 2009, TPE is a software tool available for desktop and mobile devices to help you plan outdoor photography shoots to ensure the best possible natural light.

TPE for Desktop is a free download and runs on Windows and Mac courtesy of Adobe AIR.

TPE for iOS is available for purchase on the App Store.

TPE for Android is available via Google Play.

TPE has become the premier tool for outdoor photographers planning natural light. We’re delighted to have seen TPE used by professional and amateur photographers around the world to create some stunning images. Please check out the links below to see something of how TPE is being used by photographers today.

We welcome your feedback on TPE. Please e-mail with your comments and questions.

TPE is published by Crookneck Consulting LLC. You can find out more about us and our other projects, plus contact details, at

Media, web-site owners, bloggers

If you’d like to write about TPE or would like to review the product, we’re happy to help. Please contact with any specific questions or requirements.

Press Releases

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We can send reviewers a promo code for TPE for iOS (subject to availability). Please e-mail with details of your request.


Do you publish your own web-site? If so, you can earn up to 7% commission on sales of iPhone Apps, including TPE for iOS. Find out how to apply at the link below:

Apple iTunes Affiliates

Getting set up is straightforward and you can be earning additional revenue within 24 hours.

TPE around the web

A selection of writing and articles about TPE from around the web:

Adorama Camera – The Photographer’s Ephemeris is way cool
Alex Wise Photography – Calculate sunset direction and its time through this tool..
BestAppSite – 5/5 Get it. This is a quality application that has been very thoughtfully and carefully designed.
Brent Pearson’s Photo Journey – A Great Tool For Photographers!
Bruce Percy – The Photographer’s Ephemeris for iPhone
Bruce Percy – The Photographer’s Ephemeris
Caborian – The Photographer’s Ephemeris: Imprescindible para el Paisajista
Digitale Fotografie Tips – Photographer’s Ephemeris, plan het beste moment
Digital Photo – October Skies—11/02/09
Digital Photography School – It’s all about the light: The Photographer’s Ephemeris
fotografia – The Photographer’s Ephemeris, todos los detalles sobre la salida y puesta de sol
Fred Weymouth – Review of The Photographer’s Ephemeris
Kruger-2-Kalahari – Of all Landscape Photography Tools, The Photographer’s Ephemeris is a must!
National Geographic – Photo Gallery: Photographing the Night Sky
National Geographic – Tracking the Moon
National Geographic – Extreme Photo of the Week
Olaf Bathke – Tolle Iphone App für Fotografen: The Photographer’s Ephemeris
Outdoor Photographer – The Photographer’s Ephemeris
Outdoor Photographer – The Photographer’s iPhone Edge
Outdoor Photographer – X Marks The Spot – Free Software for Landscape Photographers – Photographer’s Ephemeris now available for iPhone
Thom Hogan – Be a Calculating Photographer
Tim Parkin – Using the Internet to Scout a Location

Site Credits and Acknowledgements

Subtle Patterns (Subtle Patterns) / CC BY-SA 3.0