What have I done wrong?

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User0072362798 Regular Member • Posts: 111
What have I done wrong?

i was taking two-minute guided images with a canon 70d on an 8' celestron scope

can anyone suggest what i've done wrong here … the stars have a funny shape … sort of like a comet ... not just on the periphery, but even towards the middle of the image.
could the likely cause be:

tripod not level;

bad polar alignment;

something to do with focus,

scope not properly balanced.

thanks for reading.

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Canon EOS 70D
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