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Hmmm,
ok for Deep Sky Objects to be imaged you will need tracking in both RA and declination. Without it, you will not be able to stack any images as they will all have star trails. Even short exposures at 10sec and at prime focus will show trailing.
You could however use the stacking method for planetary imaging. You might like to consider reading how to do planetary imaging without tracking.
My suggestion is to buy a good mount that tracks (polar aligning is easy really) and then look more into buying a scope. You could buy a small refractor like the ED 100 which would serve your purposes.
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