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I use the ES HR visually. As good as it gets IMO. Gets rid of the coma in my f4.8 Newt and ES 82º eyepieces 30 and 18mm are good with the helical part 15mm out...ES 68's are good at 19mm out. There was a thread last year???? in the eyepiece section, on the ES HR and Adrian, who started it has a SW dob with a Synta focuser.
The beauty of the ES is no parfocal rings are needed with the helical threads. Once you have worked out whats best, visually that is, it's easy. Also comes with some bits for camera's to attach once the helical part is screwed off.
Matt
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