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Hi Jake
As Jakob said, with these scopes you are swapping aperture for the convenience of a go to. 4 inches these days is a really small scope and unless you have quite dark skies, and I note you are in Perth, small aperture will severely limit what you can observe with these.
For visual observing, aperture makes a lot of difference. Dobs have the advantage that aperture can be gained very cheaply.
Malcolm
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