From: "Roger Chisholm-Batten" 
To: "atm" 
Reply-To: "Roger Chisholm-Batten" 


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Just about finishing my 8.75 f7.3 sonotube dobsonian.

What about first light?  When is it?  Is it 1) the first coherent flash =
of an image as one is jiggling the secondary into position, holding the =
eyepiece in an un-attached focuser with a skewed primary 2) Initial =
collimation with the tube clamped to a workmate pointing to a = terrestrial
object 8 miles away or 3) with everything connected, mirrors = acceptably
collimated, no paintwork but a glass of bubbly in a scarred = calloused
hand?

Roger

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Just about finishing my 8.75 f7.3 =
sonotube=20
dobsonian.
 
What about first
light?  When is =
it?  Is=20
it 1) the first coherent flash of an image as one is jiggling the = secondary into=20
position, holding the eyepiece in an un-attached focuser with a skewed=20
primary 2) Initial collimation with the tube clamped to a workmate
= pointing=20
to a terrestrial object 8 miles away or 3) with everything connected,=20
mirrors acceptably collimated, no paintwork but a glass of bubbly
= in a=20
scarred calloused hand?
 
Roger

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