I have the the 28mm RKE. I bought it because I had the 15mm and because it came up often on people's 10 best eyepieces of all time lists. Very often.
I have not used it a huge amount but its as described where the image tends to float and the eyepiece disappears.
I haven't tried the ES 24mm but it sounds like its similar to a Televue Panoptic which is a workhorse type of eyepiece.
An actual Panoptic would also be a good choice. A lot use the Panoptic 24, my workhorse in the past was the 19mm Panoptic. My go-to comfort lens.
None of these though are likely to come close the APM 30mm UFF.
But now we are talking about a $500 eyepiece.
There is also a Pentax XW 30mm which I regularly see recommended. Sometimes Pentax go on sale at Agenaoptics.com.
Greg.
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