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Still cloudy.
I changed the battery in the laser collimator and now I do get a reflection off the rear of the lense, a little off centre.
I have checked the laser collimation and it seems a few mm off over 6m in one plane . Less perhaps than can be adjusted out or the tolerance of any eyepiece holder. Not sure. Tiny fractions of a millimeter adjustment at that focal length.
The focus tube seems to be consistently 1mm off the centre of the lense cell and can not be adjusted out.
The question remains as to whether reflection from the back of the lense is an adequate collimation adjustment tool or simply an indicator that collimation may be required. Any thoughts?
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