Svbony MK127 Maksutov-Cassegrain OTA boasts an effective aperture of 127mm and a focal ratio of 11.8, Featuring 99% high-reflectance dielectric coatings, a built-in flat-field design, and a three-element Maksutov structure, it offers a choice of 2-inch or 1.25-inch eyepiece interfaces. SVBONY SV241 Astronomy Power adapter is a hub specifically designed for astronomical imaging and an invaluable assistant for deep sky astrophotography. It integrates a plethora of power and data interfaces, featuring exceptional industrial design. SV241 power hub adapter has 6 High-Power DC Outputs: Dedicated DC output port supports devices requiring up to Maximum 6A.; 2 USB 3.1 ports for ultra-fast data transfer and higher poweroutput; Maximum USB Output Current per port / total: 2.5A SVBONY SV238 Off-Axis Guider(OAG) delivers precise,reliable astrophotography performance. Direct connection to deep-sky cameras with M2.5 holes (noticed back focus). You can also connect to filter drawers (SV226 M54&SV226P);Compatible with ZWO/ToupTek New motorized filter wheel(with screw holes). The SV226P filter drawer has 12 additional M2.5 internal threads on the back for installation and use with the SV238 Off-Axis Guider.