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Thanks for your post Joe. Reconciling your experience with the first post I'm thinking it's no more difficult to collimate the ACF design, but miscollimation will do more damage to the image.
Theo, I doubt that statement by ATSCOPE. The primary is near the rear end of the tube and connected to the rear end by the focusing rod, which doesn't negate the fact that the structure separating the mirrors is carbon fibre. It's just a shame Celestron didn't design in a couple of filtered vents to let the heat out.
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