With PhotoGrade off, the LaserWriter IIf and LaserWriter IIg are just like the LaserWriter IINTX:
Frequency: 53 lpi
Screen Angle: 45 degrees
With PhotoGrade on, there are five settings available via the LaserWriter Utility. Here are the numbers:
Far right: Frequency: 150 lpi; Screen Angle: 0 degrees
Middle right: Frequency: 106 lpi; Screen Angle: 45 degrees
Center: Frequency: 83 lpi; Screen Angle: 56 degrees
Middle left: Frequency: 75 lpi; Screen Angle: 0 degrees
Far Left: Frequency: 53 lpi; Screen Angle: 45 degrees
Note: The "Middle right" setting is the default PhotoGrade setting.