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I'm not exactly clear on the difference in optics between the prime focus, projection and afocal methods, but I guess the prime focus method only works if the observed image is virtually at infinity?
Anyway I did try mounting an eyepiece inside the 2" T2 adapter with a strip of packing foam sheet wrapped around the EP and taped in position. It worked quite well to hold the ep in position and central/parallel, however I was only able to get the setup to focus with a 10mm EP right up to almost touching the inside of the DSLR and then I had the 2" adapter gripped at the very end of the travel of the crayford focuser. With other EP 's I was only able to get close to focus holding the camera a few centimetres further back. I guess that's why long spacers are required when using the projection method (which I don't have). I guess it wouldn't be too hard to make a spacer from pvc for a trial run.
Later on I tried taking some afocal shots at an eyepiece with the camera held on my binocular mount but I found it too frustrating trying to get everything aligned before the moon moved out of frame.
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