Long eye relief eyepieces get some of their eye relief from using barlow lenses in their design. I have owned Long.Perng ,TMB II, and Astrotec Paradigms, all are planetary type eyepieces. So far my testing has shown a quality plossl or orthoscopic, with or without a barlow offer sharper views. I now no longer use TMB planetarys or L.P. eyepieces for critical viewing. These compound eyepieces usually have a lot of internal reflections, mainly on the moon. I found using a baffled barlow and a comfortable plossl or ortho gives the best results. Hope this helps.
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