def METHOD_NAME(self, value):
    """Returns image plane distance"""
    if isinstance(value, list):
        lens_combination = self.convert_value(value)
    else:
        lens_combination = value
    return 1.0 / (
        2 * 341.52 * lens_combination / 2000 / (self.energy_value ** 2)
        - 1 / 42.6696
    )