[Profiler (Profiler)]

I have done side by side comparisons with a number of XWs with Delos on a few refractors and optically couldn't discern any difference between them.

I also took some measurements and was amazed to see that while the housings were slightly different the optical elements appeared to be virtually identical.

However, I did find that the comparative size and weight of the XW to be smaller, lighter and "very subjectively" felt far more sturdier. I "personally" thought the adjustable eye-cup design on the Delos as something that would be prone to break if twisted the wrong way/over twisted and/or after prolonged use. I also found it quite inferior in terms of ease of use in comparison to the very simple twist top design on the XW.

Finally, before this triggers any howls of protest and indignation from Delos fans I do have quite a few of the very big ticket Televue eyepieces which are great as well but from "my" experiences and preferences I personally think the XWs are a better eyepiece to the Delos (only) for a variety of reasons in the scopes I have tested them both upon. Thus, when I want 100' fov then Ethos has no rival and a low power flat field the Terminagler still reigns supreme in my view.

So, as many have commented before there is no one holy grail in eyepiece lines that is perfect in all circumstances and they all have strengths and weakness in terms of what some can do better than others and most importantly there is a personal taste element to all of them.