@"bambi851"#p98844A maximum step size of 200 already meets the needs of most telescopes. Before initiating autofocus, you should first manually position the lens to the approximate focus point. If no manual focus adjustment has been made, the initial position may be significantly off-center when autofocus is activated, leading to focus failure. If the autofocus step size exceeds 200, the likelihood of failing to locate the focus position increases.Additionally, it is best to focus on an object 1 kilometer away during the day, such as a house or other objects, for calibration or testing.Remember to avoid the direction of the sun