Why do long-exposures take longer to process than short exposures (Canon 5D MKIV and Canon R5)?
With a 30 second exposure and cable shutter release, each image will require about 33 seconds before the next image is taken. A full 3-second gap occurs between shots. The same if the internal intervalometer is used. It has to be set to 33 or 34 seconds, otherwise there are 30 second or so gaps between shots.
