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Newtonians can have a smaller central obstruction than SCTs, so that they give better contrast.
Newtonians are longer than SCTs and have the focuser at the top of the tube, whereas SCTs have them at the back.
So, it is much easier to be able to sit down and look through an SCT, than to be constantly either standing up or sitting down to look through a Newtonian (depending on where it's pointed).
If you are going to be using your pier mounted telescope a lot, comfort has to come into it.
Cheers,
Renato
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