To record diffraction images from static crystals in electron counting mode, the Apollo detector was operated at an output dose-fractionated movie frame rate of 60 Hz, meaning that each output movie frame consists of the sum of all the events detected for ~16.7 ms. All images were gain-corrected and saved as full 8192x8192 frames. In this same mode, to facilitate electron counting for continuous rotation MicroED data collection, the detector was operated at a rate of 0.3-2 Hz, and stage rotation was configured such that each frame sampled one degree of data. The typical dataset, under our fast data collection scheme, sampled 100 ° in a single 100 frame-movie saved in MRC format; this was converted to a series of individual SMV format frames for processing. Slow rotation (0.3 °/s) data collection datasets sampled an equivalent wedge of reciprocal space, in an equivalent number of frames, but with a larger corresponding total fluence.