Reply To: Bahtinov diffraction pattern not right › Forums › Telescopes › Bahtinov diffraction pattern not right › Reply To: Bahtinov diffraction pattern not right 22 April 2026 at 12:23 pm #637242 Dr Paul LeylandParticipant Are you sure that the scope is in focus? The vertical line is usually outside the cross when it is severely out of focus. Otherwise, I have no idea at present.
