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>And as long as you stick to the stock >eyepieces, typically 10mm and 25mm, you cannot get both the Pleiades >and decent planetary views with the same scope. That is a real >problem with the ETX-70. My experience with the ETX-70 was that even with good quality eyepieces I could not get decent planetary views. I do not consider the ETX-70 as a reasonable option. >You can easily afford to buy a good Barlow for the difference in >price between an ETX-90 and an ETX-70 or an ST-80, but not all >casual observers will. And even with a Barlow, those small >refractors cannot compete with the ETX-90 at high power. Limiting my comments to the ST-80, my experience is that in comparison to the ETX-90 they are easier to use and navigate with. Focusing the ETX-90 can be a problem, the focuser knob is some difficult to access. At 100X an ST-80 will show a ring around Saturn, the moons of Jupiter and some cloud belts. An experienced observer can get more out of an ETX on the planets but I am not sure that an casual observer will. For a casual do anything scope, I think a good case can be made for the ST-80 type scope because it does the things a small scope should at night, widefield views and some planetary views and it is decent for day time use as well. Thats a casual scope for a casual observer. jon
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