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Sorry, I'd better clarify. I meant that $70 ono is a good price for the 2" Bintel barlow, but it would not be a good 2nd hand price for the inferior 1.25" Bintel barlow, which retails for $69 new.
The 2" barlow will work with both 2" and 1.25" eyepieces, and will not vignette with 1.25" wide angle eyepieces, like the 1.25" barlow might.
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