MSMs polarscope is a very nice addition to my portable grab-and-go astrophotography collection. Finally, a chance to experiment with a longer lens! Do a quick alignment with the lazer, and then tune that alignment with the polarscope. With care and patience, it is very quick to polar align and start capturing light. My first light test on Sadr in Cygnus with one minute subs at 135mm show no sign of trailing. (Bortle 4, Nikon d5500, Samyang 135mm, 64 lights and 24 darks, stacked in Siril). Very happy with the results from the addition of MSMs polarscope. Using the universal bracket for lazer and polarscope also makes things tidy, lightweight, and easy to setup.