SaffaSwede

Thank you very much Elp!

I am going to autoguide, yes. Would a M48 image train not be better then? 

Hello all. I need your help. I'm trying to get into astrophotography with a vintage Celestron C8 (1980s orange tube) that my late father passed down to me. I've had it serviced, bought a ZWO AM5n mount + TC40 tripod and am trying to get to grips with the image train now. The fine team at FLO advised me that the C8 is not good for DSO without the F6.3 Focal Reducer. So, assuming I get this and connect it directly to the back cell, I have exactly 105mm to the image sensor. Luckily, Celestron (and other brands) have this covered with their 50mm T-adapters (https://www.firstlightoptics.com/adapters/celestron-sct-t-adapter.html) and camera mounts. However, these are M42. So my question to you is that not going to cause vignetting to an APS-C size sensor? Does anyone have experience with astrophotography with a C8?