It _does_ get good, however. Way-back-when (woulda been late-80s), I did a quick test of a Schwaar 10-inch Newtonian before it was shipped to Canadian double-star observer Paul Brown. It was some evening when a bunch of folks met at Steve Coe's then-residence. The test star was 72 Peg. After an hour's cool-down (the tube assembly had been in Pierre's van all day), the 0".5 pair was nicely resolved from Steve's front lawn. That said, for _some_ applications one tends to want to try to get ~2 pixels per full-width half-maximum image blob on a CCD. HOwever, for the types of imaging Matt seems to be suggesting he wants to try, he probably doesn't need that large an image scale. Presuably Jon Christensen can weigh in here with what his image scale is for all those marvie calendar shots he takes. Similarly, I think Tom Polakis can report on actual "delivered image quality" with the set-up had some years ago in Tempe. \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.