There really isn't much that can be deduced from a 124kb heavy compressed file. I opened it up and compression has destroyed everything but the stars
What exposure time are you using?
If you are not using a tracking mount then increasing the focal length then you increasingly have to use shorter and shorter exposure times. I'd actually go the other way and suggest that using a 50mm lens would be wiser. With a 50mm you should be able to use ~10s without needing a tracking mount.