Hi
The LVW 22mm is an excellent eyepiece - crisp, sharp, contrasty and wide enough for me. But, can't say I've compared it to the Pentax 20mm xw... The Vixen is one of my favourites in my 8 inch f6 dob and 100mm f13 refractor. The Vixen lvw 30mm is also rather nice.
Andrew
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