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This is a video comparing the difference between a cheap refractor telescope and a very expensive refractor telescope. I compare the focusers, field flatteners, building materials, and optical differences between the two for astrophotography. You surprisingly do not gain much performance for the extra money, and if you are starting out I recommend you go with a cheaper scope. If you are using a full frame, you have to go with more expensive telescopes.
Here are some telescopes I recommend to you as a beginner, they're all mostly the same just get whatever is in stock (and don't forget a field flattener):
Orion ed80tcf: bit.ly/3d8QU3B
Askar FRA400: bit.ly/3B7DQDE
RedCat51: bit.ly/3qw0Bw6
WO GT81: bit.ly/3eBOx9T