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Well... the first consideration is the range of eyepiece focal lengths that suit your scope, for an 8" f/10 SCT, 8mm ... 50mm.
The question for you is which matters most to you:
- image quality,
- wide apparent field of view, or
- low $$$
There are some bargains to be had IMHO in the low to midrange eyepieces and there is no compelling reason to plunge into a set of Televues for an f/10 scope.
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