Tony,Don't know about the QX series. I have a Meade UWA 14 mm. It works fine in my 10" f4.5. I get just over 1 degree fov @ 82 x mag. Granted it has an 84 degree app field but the image is crisp to the edge. It would want to be for nearly $700.00! Another member has the Meade Super Wide 68 deg,18 mm and the views thru his 10" f5.6 are really crisp as well. Meade make good E/Pcs. I wouldn't swap any of mine. (5mm,6.4,9.7,12.4,15,UWA14and32mm). All Super Plossls.
+ #140, 2x barlow. HTH.
ps. 18mm +25mm MA. for school work.
pps. The 5mm I just got off eBay for $10.99 US + $9.95.US postage ($26.50AU,saved about $145.00 AU).