This question has surely been asked and answered before, but I'm too lazy to do the research: When an eyepiece is configured to be used in either 1¼-inch or 2-inch diagonals or focusers, does it give a wider true field of view in its 2-inch than in its 1¼-inch configuration? Specifically, I note that Orion's new Stratus wide-field eyepieces, which some reviewers have indicated may be of pretty good quality at a reasonable price, can be fitted in both 1¼-inch and 2-inch focusers. Suppose I obtain a 17 mm Stratus e.p. and use it in an 80 mm refractor, would it make any difference if it rides in the diagonal's 2-inch barrel or in the diagonal's adaptor for 1¼-inch eyepieces?
NexStar 8i SCT, Orion 80ED APO refractor, Orion 120 mm EQ refractor, 3.5-inch Questar
