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positioning of camera with AO8
I am finally going to give my AO 8 with SBIG ST 4000xcm a go as my cooled dslr is not working (see other thread).
My question is this
Currently I achieve focus with three ext. tubes plus feathertouch focuser on my RC 8 with the mono QSI.
If I position the SBIG at roughly the same position would this be presumably at focus point- therefore do you put the sensor there or the front of the AO glass? I mean does the AO 8 matter that it will be ahead of the in focus light cone?
To clarify say the QSI is in focus at 150mm from the RC 8 back plate, should I place the SBIG sensor there to start with or the AO8 glass?
Cheers for any advice- can't really try it as raining but would like to know so I can set up ready.
Graham
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