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collimation woes
hello members i hope i can get some advice needed here
i have finally hit "bravery status" last night and decided that i really need to be able to collimate my sct
i will go directly to the last step (to cut a short story long ha ha!), so i had my c11 at f10 with a 2" 2 times powermate, 2 times cannon adaptor, 60da.............. well bugger me it seemed to be working fine at that magnification, and all observations through EOS utility on my computer
it all seemed to be really good until i put my 0.63 reducer back in and my 60da to get a sample shot of nice pinpoint stars, and as i was getting the focus of a brightish star the bloody doughnut was sitting close to the bottom, completely misaligned!
any idea how this is so?
i have had to refocus stars after changing adapters many times and the hole has always been roughly central, i hope i have not mucked up anything more serious?
please help as it is getting me down!
pat
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