I have a Tele Vue 8-24mm zoom, bought about 6 years ago. on an 80mm or 100mm wide-field refractor they are quite versatile, although I find that at the 10-8mm range the image gets a bit soft. The most annoying thing is that it is not parfocal, but it's nice to adjust the magnification to improve the contrast (as you go to higher mag). The field of view is also very narrow. Doesn't bother me too much for atsronomy unless I want to see large objects, but try it in the day time and you really notice how restricted the view is.
Quality is reasonably good for the price, but if you have premium eyepieces (I have a couple of Radians/Naglers) you will notice the difference.
Morton
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