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G'Day!
Im guessing that back focus is the problem, you could try using the afocal method, which is imaging through the eyepiece, separate & independant of attaching it to the scope.....try the moon tonight, focus on the moon as you normally would visually then hold your camera to the eyepiece, try not to rest it on the scope as vibration and bumping will blur the image, maybe zoom in a little if you can to help fill the field of view on the camera, its a little tricky but it should be a start.
A lot of newtonian reflectors have trouble with being able to focus using a camera.
There are a couple of ways of avoiding it but essentially a Schmidt-Cassegrain or Maksutov catadioptric telescopes were built with photography in mind.....
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