Quote:
Originally Posted by mark3d
Often the lasers are not a perfect circle and the inaccuracy gets magnified when using the barlow so that you can end up with an elongated circle (in my case more like a rectangle) of light hitting the primary mirror.
I guess it's better to refine the beam shape within the collimator itself, which may or may not preclude the need to do it again in the barlow, but this works for me! |
So when aligning the secondary without the barlow attached you find the laser spot too large/irregular for accurate placement?
gb.