If you're wanting a downward facing camera, AND you're flying transonic, you want a mobius camera with a mobius carbon fiber, conformal camera shroud that houses the mody of the camer within the rocket body. I've seen these used in my club (nrvr.org), and they're super nice:https://www.liquidfyre-rocketry.com/index.php?route=product/category&path=63 Mobius cameras are one of the better small sports cams.https://www.amazon.com/dp/B00N6AWQ5I Tweeks
