Hi People here are the basic "rule of thumb" settings for your DSLRs
Set your DSLR to Manual
As wide as possible.
As high as you can without getting excessive noise.
Set to Tungsten (Daylight) but if shooting in RAW then it can be tweaked in post
Set to 10 or 2 Seconds
It’s a good idea to lock the mirror up before the exposure to reduce camera
movement and vibration caused by mirror slap
Set to One Shot
600 / Lens Size = Max Exposure
600 / 16 = 37.5 sec
If your lens has Image Stabilisation
hope this helps those who where asking
A few bits and bobs!!