Thanks All,
Yes Janoskiss, I was thinking of placing the camera offset at the 'open end' and then either accept any distortion or correct it later.
Thanks AstroJunk, a 3x barlow would be much better but the only barlow I have used gave a very poor image. I have assumed that they are a kind of gimmick.
Are there good quality barlows that would be as good as a medium quality eyepiece in terms of sharpness and chromatic aberation?
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