Introducing the MASK PRO System Bundle - Seestar S50 Edition - Custom 3D Printed and precision fit for the ZWO Seestar S50. For ONE Price you get our MASK DELUXE Dust Cover **AND** the ENTIRE MASK PRO System Starter Kit. Total Bundle includes: - (1) MASK PRO Mask Holder - (1) Bahtinov Mask Slide - (1) 4x Diffraction Spike Mask Slide - (1) 6x Diffraction Spike Mask Slide - (1) 8x Diffraction Spike Mask Slide - (1) MASK DELUXE Dust Cover And check back often as we already have more Slides being developed that you can buy separately! Our MASK DELUXE Dust Cover protects your telescope while its being stored or transported. Simply press the Dust Cover into place and turn off the telescope and your set! To use the MASK PRO System, simply install the Mask Holder onto your telescope, then its as simple as sliding in the slide of your choice! Want to use the Bahtinov Mask? No Problem ... Just Slide it in! And when your done, simply Slide it out! Want to use the 8x Diffraction Spike Mask? No Problem ... Just Slide it in! And when your done, simply Slide it out! Want to use your telescope with no Mask? No Problem ... Leave the Holder attached and enjoy! So, What does each Slide Do? - Bahtinov Mask Slide is used for focusing your telescope. Simply slide it in, then focus your telescope*. When the diffraction spikes align, your perfectly focused. - Diffraction Spike Mask Slide is used for cool fun effects on bright stars. Simply slide it in, then watch as stars get cool spikes. You get a 4x, 6x and 8x Mask Slide with this kit. Unlike other Masks, the MASK PRO System can be expanded to include future Slides for purchase. The MASK PRO System takes up less than 50% of a traditional set of Masks. ** This only includes the MASK PRO system for the ZWO Seestar S50 Smart Telescope. *** This does not include the ZWO Seestar S50 Smart Telescope