I've been playing today with the colimation mechanism on my GSO newt secondary.
The original setup had a central bolt that held the secondary onto the spider with three colimation bolts. There was a spring between the spider and the secondary holder. The problem with this was the central bolt was always working against the colimation bolts making it very difficult to adjust the colimation.
It occurred to me that I could move the spring to the front of the spider. This now means the central bolt pulls the secondary towards the spider while the three colimation bolts push the secondary away from the spider.
It is definately easier to colimate - I'm planning to test tonight to see if it holds colimation in this configuration.
Last edited by peter_4059; 23-10-2010 at 06:38 PM.
G'day mate. I bought some washers yesterday and tried this arrangement. It's awesome! As you say, the central bolt is no longer fighting the collimation screws. Collimation was much quicker and easier, and with some big washers between the collimation screws and the secondary holder, I can also get much smoother rotation for fine tuning. Thanks. Can't believe I hadn't tried it sooner.
