Radian is driven by an internal gear motor that moves with discrete steps. This guarantees that Radian moves repeatably and precisely every time, but it also means that Radian has to move in increments of .0173 degrees per step. While this is a very small amount of motion ( 20,000+motions per rotation) it can create issues if you want to take an extremely slowly-moving time-lapse. Because of this, we have included the ability to preview the exact results that you will get.
When there is a problem and Radian is not be able to move exactly the angle that it is set to move, it will maintain the same interval and duration and it will alter the resulting angle. As shown in the example below, the interval and duration stay the same, but the 5 degrees of motion actually becomes 6 degrees of motion.
Below is an example of a time-lapse that is changed due to this. The red circle in the top right hand corner of the programming page highlights the information button, which is what you need to press to access the preview screen.
