Attached my 6D to my Espirit 100 APO refractor (550mm f/5.5) + a 1.5x TC for ~ 800mm focal length. The two images at totality are composite of 5s for the stars in the BG and 1.5s for the moon. I had some 20 second exposures (with the tracker at ISO100) that also came out well but didn't seem like an advantage when I could get shorter and hopefully sharper photos. Unfortunately the barlow I used softened the image a bit, I should have borrowed my friends TOA150 (legendary refractor telescope @ 1,150mm).
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