AstromaniaFocal Reducer f/6.3, Fully Multi Coated Focal Reducer Corrector That Reduces Focal Length & Ratio 37% for Telescope Eyepiece Observing, Work for C Series Schmidt-Cassegrain Telescopes

Astromania f/6.3 Reducer Corrector for C Series Telescopes

Celestron T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A)

Celestron - SkyPortal WiFi Module - Control Your Celestron Computerized Telescope via Smartphone - Telescope Wi-Fi Accessory