Wow, talk about a hot topic!
I own a type 6 Nagler 13mm, a type 6 Nagler 7mm, a type 4 Nagler 22mm, a 27mm Panoptic and a 35mm Panoptic
I built that collection up over a period of years, sometimes buying and selling other eyepieces to get the right combination. I figure it is just about the most perfect eyepiece box you will ever see, I also have an apo barlow to round it off. It is hard to describe the difference other than to agree with a previous comment that the noise made by observers when looking through these eyepieces is probably the best measure. The porthole effect is as applicable when viewing low power as it is when using the 7mm. I guess if I had to choose between a good scope and an average scope or good eyepieces and average eyepieces the eyepieces would stay. Over the years I have had the opportunity to look through many different eyepieces including Pentax and I have necer seen an eyepiece that I would swap for one of mine.
For me that says it all.
Paul Medcraft
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