A fantastic collection of various deep space objects, imaged in HaLRGB by Jim Misti. Working with just the L (luminance) frames, before delving into HaLRGB combining, is great way to learn the ropes.
Results are free to publish, as long as they are credited "Image acquisition by Jim Misti".
Thank you StarTools for turning my average photos into amazing ones.
Bin the image up until each pixel describes one unit of real detail.
StarTools keeps a detailed log of what modules and parameters you used.
You can convert everything you see to a format you find convenient. Give it a try!