Another thing is when attaching a camera it can pull your scope off line a bit, my 700d would pull the mak I had down at the back end tilting it up enough to pull a star out of live view. Make sure your finder is spot on to assist any movement caused by adding weight. I could get stars with an ep and would track, when I put the camera on prime it would be gone and would have to go back using my finder scope. Then live view it to centre and take a pic to check zoom, at ISO 3200 for a few seconds is enough to capture the star. Using a bahtinov mask and live view on 10x zoom can cut the need to take shots but I did just to be sure.
I picked up my mask off ebay for 12$ and works a treat, done on a 3D printer from a guy in Melbourne. Will be buying another from him.
Hope that helps
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