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Hi Mark,
Put it this way, I thought everything was OK with my collimation with film canister and then I found out that it was good 5-7cm away from the centre with the laser collimator.
What does this mean is that even though star test was OK, and viewing was good I was not using full potential of the mirror. This is mostly apparent with higher magnification.
The hole on the film canister has to be very small, so when you move your eye around it doesn't shift the picture out of centre. That's why I even had to block hole that came with my new Skywatcher Cheshire collimator eyepiece and make smaller one instead.
I definately would recommend one of those tools, either laser or Cheshire. Andrews is selling them $59 for laser, and $49 for Cheshire.
Last edited by bobson; 23-11-2008 at 08:50 PM.
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