This microsight Microscope Lens Tip 150x acts as a spacer and is carefully calibrated to achieve specific magnification when used with the microsight microscope. These Lens Tips for the microsight 10-200x microscope are available individually. This microscope lens tip is the 150x. This tip can only be used with the microsight 10x-200x 1.3MP Microscope. Also available are 15x, 30x, and 50x.