Backfocus on the EdgeHD 8 using an OAG

This video provides a few possible solutions to the back focus puzzle that you encounter should you want to implement the Celestron OAG on an Celestron EdgeHD 8" telescope and a ZWO cooled astronomy camera. I will not cover how to setup your guide camera in the OAG. I'll leave that for another video. How I solved my puzzle can also be seen in this sheet: https://docs.google.com/spreadsheets/... F7: OAG SCT adapter 25.3 OAG body 29 OAG male M48 12.5 ZWO filter drawer 21 ZWO spacer 11 Sensor depth. 6.5 Total 105.3mm (required 105mm) F10: Celestron T-adapter 50 OAG female M42 4.5 OAG body 29 OAG male M48 12.5 ZWO filter drawer 21 ZWO spacer 11 Sensor depth 6.5 Total 134.5mm (required 133.35mm) If I got away with the small discrepancies will have to be seen. No clear nights yet over here... In case you want to go with the nosepiece solution (the one I feared) than you'll need a 2" nosepiece which adds 1.7mm back focus distance and the Telescope Service SCT visual back which can be bought here (not affiliate): https://www.teleskop-express.de/shop/... The safer bet is to use the Celestron #93644 T-adapter: https://www.ganymedes.nl/product/cele... #asiairpro #asiairplus #zwo #optolong #ioptron #cem40 #celestron #edgehd #williamoptics #gt81 My links ———— TWITTER:   / mjschoenmaker   INSTAGRAM:   / astrokoplamp   TELESCOPIUS: https://telescopius.com/profile/schoe... ———— Music/Sound effects: Space - Saturn Dust -    / @saturndust   "Subscribe Button" by MrNumber112    • Free Download: Subscribe Button + Notifica...   ———— Edited in #Shotcut https://www.shotcut.org/