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howie glatter laser has landed
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yes, i use the tublug. it makes adjusting the primary easy as you can see the reflection in the display on the tublug. only downside is that once you get the paracorr + the tublug + glatter laser all in the focuser then it sits out a long way and gravity could pull it down?? if you have a quality focuser then that should be okay.
the other thing I did was to measure how far the focuser travel is out when I am "in focus" with my most used eyepiece. then i use this focuser drawtube postion as the start position for collimation rather than having the focuser racked all the way in. You should try both ways and see which gives best results.
I found that having the focuser in the most used postion and collimation from that point meant that I got better stars.
Alan