Improving MicroED/3DED data quality with post-column energy filter. Selected area diffraction pattern from a single catalase crystal showing the low-resolution diffraction shell acquired without (left) and with energy filtration (right). Both diffraction patterns were collected from the same crystal under identical experimental conditions, except for energy filtration. Exposure was 1.3 s, and slit width of 20 eV was used for the diffraction pattern on the right.