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Neither of those scopes is very versatile. The achromat has severe chromatic aberration but would be okay for low power / widefield. The Mak's got long F.L. and narrow FOV, but not enough aperture to really excite on the planets (I used to own one, ie SW 102mm mak). An ED80 would do everything that these two scopes do and more. So in that sort of size I'd recommend you go with an ED80 on a Vixen Porta mount (or similar) - much better than the AZ3. Or a 5" Newt on the same mount (check out Starkler's setup).
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