An update:
The measurement I had below of 65mm was really 55mm.
( Result of using a measuring tape instead of a proper steel ruler)
I moved my P mirror up about an inch & it all focused nicely
just above the top of the focuser.
Still - I needed the RCC.
Maxim DL didn't work again - camera connection problems.
I used Easycap & PHD guiding instead.
Anyway - I felt a bit better to have some first light data.
I have 3 minutes x 3 of LRGB &
one 10 minutes of Ha for M8 - the lagoon.
I'll have to process them into colour soon.
This was a quick process of just 2 out of the 13 sub frames:
Link to 3 minutes of luminance - one frame.
http://i262.photobucket.com/albums/i...2/m8180sf1.jpg
10 minutes of Ha through an Astronomic 7nm filter.
http://i262.photobucket.com/albums/i...lpha600s_a.jpg
I have all 5 filters in the filter wheel & I only
had to refocus for the Ha filter.
The RCC still caused some coma in the corners.
I checked & it is very close to 91.5mm from the sensor.
Maybe it needs to operate at a slightly different distance?