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My experience:- I asked at Bintel for the Bintel Cheshire. I was advised not to buy it but rather the Orion Collimating tool, which I did. (The staff members were quite convinced the Bintel tool was of unsatisfactory performance.) I have to admit, however, that I have never really made much sense of the view through that tool. I never put it in until I was collimated with the laser or barlowed laser and the Orion tool seemed to say it was spot on. However, recently, I was able to put a different Cheshire tool into my scope and the difference was significant. I could understand what I was looking at and crosshairs were in much better focus. I was told that Cheshire was from Andrews Communications. I've just looked at their site and it must be this one:- "Collimation eyepiece, Cheshire Newtonian type, Skywatcher brand" - $49. I look forward to hearing other comments.
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