i took the lens from my other telescope into my self-built telescope , i had to improve because the other lens has a lower focal length (700mm) - the lens for MY telescope about 1330mm so i had to put the lens INTO the tubus - the result was clear, the picture was sharp... i can see two possibilities: the first is the lens isn't good enough, the second is that to much light is shining into my telescope so i have to change it.
i hope that the second possibility is right, i will consider that^^
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