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Old 21-11-2007, 12:27 PM
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Tannehill
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Join Date: Mar 2007
Location: Tucson, before that Wisconsin, before that Melbourne, etc etc.
Posts: 231
Sounds good. Can't argue with that - that stiffer springs will make locking bolts less helpful. For sure, those locking bolts do make collimation drift, even with heavy springs that I have. When I watch my barlowed laser image real-time as I turn the locking bolts, the donut moves with even a 1/16" of a turn of that locking bolt, so your system makes sense. In fact, when I tighten those three locking bolts, it's like re-collimating all over again!

I'd say that a relatively inexpereinced person might be lulled into thinking those locking bolts don't affect collimation, and that is misleading, and they'd suffer by not checking afterwards. But, the one advantage is that someone who can't or won't tweak things in the field after transport from home and setup in the field might benefit more from them, provided they realize the above re-collimation issue, because they're more likely to be relatively collimated upon setup with the locking bolts helping to stabilize things....

Regards

Scott

Quote:
Originally Posted by Loupy31 View Post
Well Tannehill,
I like simple, and after seeing them in action at vic south, I figured thats the way to go, Now I have been down the "locking screw" road and there are times they are a pain, you get your scope just right once you set it up then you lock the mirror and its out a fraction, so you undo it , back off your collimation knobs and then tighten it, what I am getting at is, it's almost like trial and error , when you have a push pull system...I hope I have explained it well, I am not to good at explaining things. Look how simple the secondary is, 3 screw, ok you have to loosen one tighten the other but you get the idea, I aways collimate after every setup any way so after a road trip I would expect to collimate which brings me to the subject of "Collimators" any recomendations anyone?

Regards Peter
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