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Another Q following on this theme.
I'm looking at completing the webcam project listed in the 'Projects & Articles' using a Logitec webcam.
My intention being to photograph the moon & planets during 'show & tell' at schools to add another dimension to the experience.
I'll be using it mainly with a 17.5" f/5 (2000mm) scope & unguided. What size barlow would be the most practical under the circumstances, 2X, 3X or 5X?
Mental.
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