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^^^ you can't use "unless you move your head around to see different parts of the field" as a argument for a comparison of Pentax XWs against naglers because that is an effect of the FOV, which the pentax is a massive 12 degrees less. It is for this exact reason that you can't compare Pentax XWs to naglers. You need to cpmpare it with something that is similar, and naglers and pentax XWs are not similar. Panoptics (68 degrees FOV) and Pentax XWs (70 degree FOV) are similar, and if you are going to compare apples to apples you really have to compare these two eyepieces.
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