Here's another question..
What would be the likely visual effect of the type of collimation error I have? If I'm understanding correctly (and I'm almost certainly not
) the light travelling from primary is converging on the secondary toward one end rather than the center, however I do have the focuser axis lined up with the center of the primary (center mark centered in cheshire ring).. so.. does all this simply mean a little less light reaching the eyepiece since it's not hitting the largest part of the secondary? so I can expect dimmer images? or is there more to it..?
Thanks again! (just tell me if I'm being a nuisance!)
PS. another question would be, why could I not simply adjust the secondary so the cheshire ring is centered, using the cheshire eyepiece.. what does a sight-tube add to the equation?