This Miicrosight Microscope Lens Tip 15x 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 15x. This tip can be used with the Microsight 10x-200x 1.3MP Microscope. Also available are 30x, 50x, and 150x.