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SCTs are hard work because they are dreadful in keeping collimation (I have to check and usually recollimate every time I change elevation more than about 20 degrees with my C11)
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Wow, I find that staggering. What criteria are you using to judge collimation accuracy? I personally have never needed to collimate my SCT -- it holds it beautifully -- let alone feeling the need to do it every time one raises the OTA's altitude axis!