I'm not a Nagler fan, to put it bluntly. Besides being a rich man's "toy," they weigh a ton and cost more than my whole telescope. However, my biggest problem is the number of elements in them. I observe faint fuzzies, mostly obscure galaxies (right now the Herschel lists), and they have so many elements (8-9) to get those wide flat fields of view, that they suck the light right out of the image. That is not a problem with the Q-70 series.
I got this 26mm jewel, as part of the whole Q-70 set, for Christmas. When I want a close-up view of a faint fuzzy, this is about as high a magnification as I like to go. I usually find the object with either the 38mm or 32mm in this series, then if I want a close-up, I put this one in. I don't know why exactly, but it seems to have the best overall correction and the least distorted edge of the set. I finally had a chance to put it through the paces in February, on what was close to a Horsehead night. The 2" format really helps but the big thing for me is the wide field of view. This is basically a modified Erfle design with 5 or maybe 6 elements, not too many to take away the faint light I search for. Sure, the edges have a lot of coma, or as I like to call it, the fishbowl effect, but the majority of the field gives excellent images. This eyepiece is great for sweeping, or "mowing the lawn" as I look for faint galaxies. Even at the extreme edge, I could tell the difference between the blur of a star and the blur of a galaxy, and was able to nail over a dozen Herschel 2 galaxies that night.
This eyepiece isn't perfect, with a super wide flat field. But for my money, it doesn't need to be. It did everything I wanted it to and didn't break the bank. For you amateurs out there, don't let the ad copy bamboozle you into taking a second mortgage just to buy one of the high priced oculars. Invest a hundred bucks and get something you can really use. Highly recommended.