Personally I'd prefer 8X or 9X for the magnification. Too bad they can't do a variable power magnification..... Bruce
They absolutely can but you get into size, low light ability and cost among other things. I work in film and TV and am a beta tester and spokesperson for some of the best and most expensive cinema glass in the world; regardless of price there's simply a trade off for everything in optics. ;-) I've been trying to skin that cat for 38 years now!
~Robert