Я вот дернулся сперва...Потом подумал. 70 градусов это 70 градусов, будь он хоть золотой с бриллиантовым поясом 
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вот отзыв: I'd just like to add another opinion, though I can't back it up with proof. When comparing the apparent field of view of the XW at 70 deg, with a couple of other 80 deg plus eyepieces I have , including a Nagler (not the 31T5), the Pentax doesn't seem in practice to look much "smaller". I've compared the XW to other 69 or 70 deg eyepieces and it appears wider than those for some reason. When I compare the XW to these and hold them side by side to my 2 eyes looking through, the XW is actually wider, and by more than 1 or 2 degrees. Either Pentax are very conservative with their specifications, or the other eyepieces I have don't meet their specs. Or I'm imagining it, but I don't think so.
If I was to put a figure to it, the XW seems to be more like 75 deg compared with some other 68 to 70 deg eyepieces (including the TMB 40mm Paragon). There's no doubt to me many of the cheaper widefields aren't quite as widefield as they claim.
так что ваше утверждение, не абсолютно точно. а т.к. вы не сравнивали XW 30 с более широкоугольными окулярами, абсолютно не точно. а многие предпочитают XW наглеру 31, т.к. так более "яркое и чистое" изображение
