Star Trail Calculator

Scott J. Waldron

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About this app

Are you interested in having a helping hand when doing astrophotography with a stationary tripod and DSLR camera? This application can help you calculate estimated maximum exposure times to avoid star trails without the need for a tracking mount. It also has a calculator that you can use for creating star trail photographs by giving you an estimation of how long the trails will be in pixels given inputs about your camera, lens, and exposure time. The three calculators range from a simple two input calculator to one for advanced astrophotography camera users. Also included are some tips and help screens to improve your understanding of the process and to describe each required input for the calculators. It's simple, yet does exactly what you need. Here is to amazing astro-photos on a budget!

Now with GPS based declination calculation!

Ratings and reviews

Handy tool that will eliminate the mental math. The star trail calculator helps the user visualize how much motion blur he/she should expect.

This app is handy. It bases the no star trail calculations off of the Rule of 600 (if you prefer the rule of 500 and don't want to do the math, just shorten the time you shoot for by a bit). It also takes into account sensor size for people who shoot with a crop sensor camera or something else.

And does NOT need UI improvement.

What's new

Version 1.1: Now has same features as paid app such as GPS and advanced calculators. Enabled install to SD card feature.