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best FF/FR for Explore Scientific ED102 FCD-100 2.5"

Alejandro M
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Alejandro M

Alejandro M

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I want to squeeze the light out of the ES ED102CF FCD-100 using a EOS Full Frame camera (43mm sensor diagonal) mount. The telescope comes with a so called 2.5" focuser but no information is given about thread or illuminated circle diameter and ES is profiting from this ambiguity selling a really expensive 3" 0.7x FF/FR and a 2.5"/3" adapter. 2.5" seems is 63.5mm, but the sharpstar 2.5 0.8 FF/FR comes with M75 thread and I've read the Stellarvue FF/FR are to avoided [citation needed]. Any advise on how to get the most out of this scope?

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