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Stefan, TeleskopService have several small scopes around 70mm aperture - triplets and more, some with built in field flatteners and some designed specifically for imaging in preference to visual use - the difference is in the backfocus available and focusser.
Different focuser choices available as well including their R&P type which can handle massive loads comfortably.
I have their quad 70mm f/6.67 with the built in flattener, and I’ll admit to dabbling with putting my m4/3 body on the back, very nice results on the moon, but I’m not into imaging. Very portable and a lovely visual scope... at high power for example Uranus shows and a nice green disk. Not a hint of chromatic aberrations visibly.
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