In this video I explain what calibration frames are, how to take them, and why they're so important for astrophotography. I demonstrate their importance by comparing identical images, one with calibration frames and one without. These images are so important and can really be the difference between an okay image and an amazing image! **Subscribe here** Full explanation on my website under the Tutorials section: **The equipment I use** Sky-Watcher Evostar 72ED: HEQ5 Mount: Field flattener for 72ED: Canon camera adapter: Dew strap & controller: US based viewers. Buy your gear at HighPoint Scientific here: US based viewers. Buy your gear at OPT here: