shot with fast lens (Crowes Landing)

Tried imaging Messier 45 (M45) with the fast lens, the old screw-mount Takumar 55mm, f/2.0 lens from my Pentax film system. Atop the boat house.

Continued adjusting the barn door tracker controller speed. Initially racked the focus to the hard stop. But I found it improved when I came back a bit.

Canon 40D, fotodiox adapter, Takumar 55mm, f/8, manually focused, 45 seconds, intervalometer, ISO 800, RAW, tracking mount, tripod, DPP.

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There are two comets in the area: C/2017 O1 (ASASSN) and C/2015 ER61 (PANSTARRS). But I can't see them.