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!