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Focal length too long for astrophotography
I have encountered a problem which I imagine is easily solved but is being quite the obstacle for me. I can attach my DSLR camera to my reflector telescope without any other lens and the attaching adapter is only a couple of centimetres long. The problem is that I can't wind my focus in enough for me to get a clear image. Taking into account the focusing piece and the adapter together the overall focal length of my telescope is too long.
But I don't know where I can find the right pieces to correct this. I have a Skywatcher telescope, 750mm focal length, 150mm diameter, and I need it to fit an Olympus E-420. I don't really think the adapter can get much smaller, maybe I need a smaller focusing piece?
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