Astro-Tutorial #1.14: Attaching the Camera - Afocal Projection vs Prime Focus - YouTube
Gosky 1.25 Variable Telescope Camera Adapter for Prime Focus and Eyepiece Projection Astro Photography : Amazon.in: Electronics
L03: Reflector Design & Practical Use | PHY241
Amazon.com : Astromania 1.25" Extendable Camera Adapter - for Either Prime- Focus Or Eyepiece-Projection Astrophotography with Refractors or Reflector Telescopes - Threaded for Standard 1.25inch Astronomy Filters : Electronics