Understanding FWHM & HFR in Astrophotography: Achieving Sharper, Clearer Images with Optimal Focus
For astrophotographers, capturing the finest details in distant stars, nebulae, and galaxies is the ultimate goal. But one key metric underlies achieving sharpness and clarity: FWHM (Full Width at Half Maximum) and HFR (Falf-Flux Radius). If you’ve come across FWHM or HFR in software like NINA (Nighttime Imaging ‘N’ Astronomy) or WBPP (Weighted Batch Preprocessing)