Set: Hyperion Universal Zoom Mark IV + Hyperion Barlow 2.25x (8-24mm / 3.6-10.7mm) - Consisting of Hyperion Universal Zoom Mark IV, 8-24mm eyepiece and Hyperion Barlow lens 2.25x - This combination of Hyperion Zoom Mark IV eyepiece and Hyperion Barlow lens gives the largest total focal length range of 3.6-24mm - Includes all accessories included in the basic set of eyepiece and Barlow lens. ATTENTION: Please note that this set of zoom with Barlow can only be used for astronomical purposes. It is not suitable for use on spotting scopes.