Recently, I’ve been getting into astrophotography, and this next weekend I’m going to Death Valley to take pictures! Taking pictures of the stars poses several interesting challenges, the largest of which is “star trails”. The earth is rotating, so the stars rise and set. This makes the nice pin lights that we see turn into streaks in long exposure photos. There are workarounds, like bumping up the ISO and taking a shorter exposure, but they all ultimately result in a lower quality photo. So, I’m building a barn door star tracker mount for my camera. The tracker is aligned with the north star, and it opens up at the same speed as the earth’s rotation. This cancels out the stars rotation and makes them appear stationary, preserving the pin lights that we see without sacrificing quality. I have about a week, and I’m setting a $30 budget for this project…