def default_ctffind_4_v4_1_8():
    """
    Content of CTFFind version 4.1.8.

    Arguments:
    None

    Return:
    Content items as list
    """
    items = [['WIDGETS MAIN', '7', int, '', 'PLAIN', '', ''], [
        'WIDGETS ADVANCED', '7', int, '', 'PLAIN', '', ''], ['WIDGETS RARE',
        '7', int, '', 'PLAIN', '', ''], ['Pixel size', '1.0', float, '',
        'PLAIN', 'Main', ''], ['Acceleration voltage', '300.0', float, '',
        'PLAIN', 'Main', ''], ['Spherical aberration', '2.7', float, '',
        'PLAIN', 'Main', ''], ['Min resolution(A)', '30', float, '',
        'PLAIN', 'Main', ''], ['Max resolution(A)', '5', float, '', 'PLAIN',
        'Main', ''], ['Min defocus(A)', '5000', float, '', 'PLAIN', 'Main',
        ''], ['Max defocus(A)', '50000', float, '', 'PLAIN', 'Main', ''], [
        'Step defocus(A)', '500', float, '', 'PLAIN', 'Main', ''], [
        'Amplitude contrast', '0.07', float, '', 'PLAIN', 'Main', ''], [
        'Phase shift', ['False', 'True'], bool, '', 'COMBO', 'Main', ''], [
        'Min phase(rad)', '0', float, 'Phase shift:True', 'PLAIN', 'Main',
        ''], ['Max phase(rad)', '3.15', float, 'Phase shift:True', 'PLAIN',
        'Main', ''], ['Step phase(rad)', '0.5', float, 'Phase shift:True',
        'PLAIN', 'Main', ''], ['Amplitude spectrum', '512', float, '',
        'PLAIN', 'Advanced', ''], ['High accuracy', ['True', 'False'], bool,
        '', 'COMBO', 'Advanced', ''], ['Know astigmatism', ['True', 'False'
        ], bool, '', 'COMBO', 'Advanced', ''], ['Restrain astigmatism', [
        'True', 'False'], bool, 'Know astigmatism:False', 'COMBO',
        'Advanced', ''], ['Expected astigmatism', '200', float,
        'Restrain astigmatism:True', 'PLAIN', 'Advanced', ''], [
        'Astigmatism', '0', float, 'Know astigmatism:True', 'PLAIN',
        'Advanced', ''], ['Astigmatism angle', '0', float,
        'Know astigmatism:True', 'PLAIN', 'Advanced', ''], [
        'Resample micrographs', ['True', 'False'], bool, '', 'COMBO',
        'Advanced', ''], ['Use movies', ['False', 'True'], bool, '',
        'COMBO', 'Advanced', ''], ['Combine frames', '1', int,
        'Use movies:True', 'PLAIN', 'Advanced', ''], [
        'Movie is gain-corrected?', ['True', 'False'], bool,
        'Use movies:True', 'COMBO', 'Advanced', ''], ['Gain file', '', str,
        'Movie is gain-corrected?:False', 'FILE', 'Advanced', ''], [
        'Correct mag. distort.', ['False', 'True'], bool, 'Use movies:True',
        'COMBO', 'Advanced', ''], ['Mag. dist. angle', '0.0', float,
        'Correct mag. distort.:True', 'PLAIN', 'Advanced', ''], [
        'Mag. dist. major scale', '1.0', float,
        'Correct mag. distort.:True', 'PLAIN', 'Advanced', ''], [
        'Mag. dist. minor scale', '1.0', float,
        'Correct mag. distort.:True', 'PLAIN', 'Advanced', '']]
    return items
