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The 22T4 is, in my opinion, the best of the T4 Naglers. I find it super comfortable and easy to use.
Glasses wearers will love it with the eyecup in the down position.
Non eyeglass wearers will want to have the eyecup clicked up a few clicks.
If this eyepiece seems sensitive to eye placement, it is purely because of its long eye relief and using the eyepiece with the eyecup too close to the top lens.
That some people have issues with long eye relief eyepieces is evidenced by the "pupil-positioning washer" provided with the T4s. The washer forces the eye to locate more centrally so the user won't be tempted to either drift sideways or get too close to the lens, either of which can cause blackouts in the field being viewed.
This is especially a problem with people who stand to observe (a practice I've never understood unless a ladder is involved).
The huge eye lens lends itself to an immersive view, and this eyepiece seems to have a much wider field than it does because the top lens is such a large percentage of the diameter of the eyepiece.
You will enjoy the 27mm Panoptic, which has very close to the same true field as the 22mm Nagler. It's a logical step down in power from the 17.3mm Delos, too.
The 12mm T4 Nagler, by the way, has been discontinued by TeleVue.
The 22mm, however, remains one of their best sellers.
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