Craig Stark -who wrote nebulosity-suggests that offsets ar camra dependent and vary from camera to camera.
This is why h has created an auto fuction in Nebulosity
basically you covr your camera, hav TEc running for a while and away you go
Problem is when i tried it it didnt't seem to have worked-I got an error message to that effect..but somehow a mysterious number appeared in the offset field
since I had nothing better to go by I used this number-the one time I used my QHY so far. My sense is it it is too high
but I am going to ask at the stark labs yahoo forum and someone should be able to help
will lt you know what I find out
narayan
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