John , I am out tonight using my Istar 127mm f/8 achro 1000mm f/l and with the 40mm eyepieces its about 60x thru the BV's not the 25x a 40mm would normally give , I think they act as a kind of barlow , like Matt said earlier on here in this thread , and the moon is so awsome in this combo tonight 60x with the 40mm's and 120x with the supplied WO's , you really have to see it to beileve how good using 2 eyes thru a refractor is .
You wont be dissapionted .
Brian.